UNIVERSITY OF MAIDUGURI Maiduguri, Nigeria CENTRE FOR DISTANCE LEARNING ARTS HIS 102: INTRODUCTION TO ARCHAEOLOGY UNIT: HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Published 2007© All rights reserved. No part of this work may be reproduced in any form, by mimeograph or any other means without prior permission in writing from the University of Maiduguri. This text forms part of the learning package for the academic programme of the Centre for Distance Learning, University of Maiduguri. Further enquiries should be directed to the: Coordinator Centre for Distance Learning University of Maiduguri P. M. B. 1069 Maiduguri, Nigeria. This text is being published by the authority of the Senate, University of Maiduguri, Maiduguri – Nigeria. ISBN: 978-8133-66-5 ii CDL, University of Maiduguri, Maiduguri HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 PREFACE This study unit has been prepared for learners so that they can do most of the study on their own. The structure of the study unit is different from that of conventional textbooks. The course writers have made efforts to make the study material rich enough but learners need to do some extra reading for further enrichment of the knowledge required. The learners are expected to make best use of library facilities and where feasible, use the Internet. References are provided to guide the selection of reading materials required. The University expresses its profound gratitude to our course writers and editors for making this possible. Their efforts will no doubt help in improving access to University education. Professor J. D. Amin Vice-Chancellor iii CDL, University of Maiduguri, Maiduguri HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 HOW TO STUDY THE UNIT You are welcome to this study Unit. The unit is arranged to simplify your study. In each topic of the unit, we have introduction, objectives, in-text, summary and self-assessment exercise. The study unit should take 6-8 hours to complete. Tutors will be available at designated contact centers for tutorials. The center expects you to plan your work well. Should you wish to read further you could supplement the study with more information from the list of references and suggested readings available in the study unit. PRACTICE EXERCISES/TESTS 1. Self-Assessment Exercises (SAES) This is provided at the end of each topic. The exercise can help you to assess whether or not you have actually studied and understood the topic. Solutions to the exercises are provided at the end of the study unit for you to assess yourself. 2. Tutor-Marked Assignment (TMA) This is provided at the end of the study Unit. It is a form of examination type questions for you to answer and send to the center. You are expected to work on your own in responding to the assignments. The TMA forms part of your continuous assessment (C.A.) scores, which will be marked and returned to you. In addition, you will also write an end of Semester Examination, which will be added to your TMA scores. Finally, the center wishes you success as you go through the different units of your study. iv CDL, University of Maiduguri, Maiduguri HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 INTRODUCTION TO THE COURSE This course informs students of the various theories, methods employed in Archaeology. It may include identification of sites, excavation, dating, preservation and finally exhibition and publication. Chapter one attempts to define some of the concepts use in archaeology, the various conceptions of archaeology as viewed worldwide by different schools of thoughts. No matter the bias of the different schools of thoughts all have agreed that Archaeology is connected with the study of material remains, it gathers its data through survey and excavation. Chapter two highlights the historical background of Archaeology world wide down to the Nigerian situation. Chapter three highlights the different substances obtained in archaeology and how they are preserved in archaeological record. Chapter four portrays how sites or features are discovered. Chapter five dealt with excavation the main thrust of archaeology which culminates in the dating of artifacts as conduced in chapter six. CDL, University of Maiduguri, Maiduguri 1 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 HIS 102: INTRODUCTION TO ARCHAEOLOGY UNITS: 3 T A B L E O F C O N T E N TS PAGES PREFACE - - HOW TO STUDY THE UNIT - - - - - iii - - - - - iv - - 1 INTRODUCTION TO THE COURSE TOPIC: 1. INTRODUCTION AND DEFINITION OF CONCEPT - - - - - 3 2. HISTORY OF ARCHAEOLOGY - - 11 3. METHODS IN ARCHAEOLOGY - - 16 4. DISCOVERY OF EVIDENCE - - - 20 5. EXCAVATION - - - 27 6. DATING IN ARCHAEOLOGY - - 33 - - - SOLUTION TO EXERCISES CDL, University of Maiduguri, Maiduguri 2 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 T O P I C 1: TABLE OF CONTENTS PAGES 1.0 TOPIC: INTRODUCTION AND DEFINITION OF CONCEPT - - - - - - 3 1.1 INTRODUCTION - - - - - - - 4 1.2 OBJECTIVES - - - - - - - 4 1.3 IN-TEXT - - - - - - - - 4 1.3.1 DEFINITION OF CONCEPTS - - 4 1.3.2 ARCHAEOLOGICAL CONCEPTS - - 1.3.3 PROPERTIES OF ARCHAEOLOGY - 7 1.3.4 RELEVANCE OF ARCHAEOLOGY- - 8 1.3.5 CAREER OPPORTUNITIES - - - 1.4 SUMMARY - 1.5 - - - 9 SELF-ASSESSMENT EXERCISE - - - - 9 1.6 REFERENCES - - - - - - 9 1.7 SUGGESTED READING - - - - - 10 CDL, University of Maiduguri, Maiduguri - 9 - - - 5 3 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 1.0 TOPIC: INTRODUCTION AND DEFINITION OF CONCEPT 1.1 INTRODUCTION The course is an introductory text to both historians and social scientists. It examines the definition of various concepts used in Archaeology and prehistory. It gives the amateur a first hand information on the principles and methods employed in archaeology towards the recovery of data and reconstruction of past ways of life of human populace in a given geographical milieu. 1.2 OBJECTIVES At the end of this topic, you should be able to: i. Describe field techniques through observations and recordings of field data. ii. Identify and assess materials cultural data to include knowledge of human and skeletal anatomy, elements of Geology and Geomorphology (rock types and stratigraphy, elements of surveying etc). 1.3 IN-TEXT 1.3.1 INTRODUCTION AND DEFINITION OF CONCEPTS Just like all disciplines, Archaeology too uses several concepts as bedrock towards understanding the subject. The concepts are broadly divided into two: a. General concepts; and b. Archaeological concepts. Some of the general concepts include History, proto-history, pre-history and ethno-archaeology; while the archaeological concepts are artefact, attribute, assemblage, culture, diffusion, and acculturation. History is defined loosely to mean the story of the past. Secondly it is used to mean the story of the past derived from written records or reliable oral traditions. CDL, University of Maiduguri, Maiduguri 4 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Proto-history is the history of the past where written records and oral traditions are scanty or inadequate. The periods properly called proto-historic is different in different parts of the world since full and adequate historical records also began at different dates. Pre-history is the story of earlier part of man’s past that has no written records and no reliable oral tradition. Actual dates for the prehistoric period are different in different parts of the world, because writing was introduced at different times. Ethno-archaeology is the study of material culture in systematic context for the purpose of acquiring information, both specific and general, that will be useful in archaeological investigation. It involves the pursuit and study of an actual situation in which specified behaviours can be observed. Archaeology has been defined by Thurstan Shaw (1975) as a method of finding out about the past from the material remains left behind by former inhabitants. It comprises of a system of techniques for deriving the maximum amount of information from the material culture and physical remains which have been left behind by past generations of mankind, and which have survived to the present. According to James Deetz (1967) an American archaeologist in his readable book, “An invitation to archaeology”, defined it as saying, “Archaeologists are anthropologists, who usually excavate the material remain of past cultures and through the study of such evidence, attempt to recreate the history of man from his earliest past, and to determine the nature of cultural systems at different times and places around the world”. 1.3.2 ARCHAEOLOGICAL CONCEPTS Archaeology the world over is seen from various perspectives basically because of different approaches and purposes. All groups tend to regard archaeology as a bunch of techniques used for reconstructing the past rather than a subject in its own right. European archaeologists usually belong to the historicising school; while American archaeologists tend to be anthropologists. This stems from the fact that the majority of archaeology in the America’s is aimed at studying the preCDL, University of Maiduguri, Maiduguri 5 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Hispanic Indians, and the standard way in which the Indians have been studied has been ethnographical and anthropological rather than historical, and archaeology seemed to carry those studies logically back in to the pre-conquest period. The third group see archaeology as a purely scientific discipline borrowing wide range of techniques from botany, physics, chemistry, geology etc. There is no consensus of opinion among practitioners of archaeology. If there were, we would not presently have at the University of Ibadan a full Department of Archaeology in the Faculty of Science, while in ABU Zaria the Department of Archaeology is in the Faculty of Arts and Social Science. While the University of Ibadan thinks that the subject is an independent discipline, largely a field science, Ahmadu Bello University considers archaeology as largely as an adjunct of history. But no matter what the particular bias of the individual archaeologists or school of thought, all are agree on the following: 1. Archaeology is connected with the study of material remains left behind by ancient man. 2. Archaeology aims at recovering at least, some aspects of man’s past, mainly those unrecorded by written documents 3. Archaeology gathers its data primarily through excavations and reconnaissance survey The basic archaeological concepts are as follows: Artefact, Attribute, Assemblage and Culture (Bassey, W. A. 1982:24). Artefact: An artefact is any man made or man-modified object. Gordon V. Childe (1956) separated artefacts into relics such as pots, metals, weapons, stone tools and monuments, which include tombs, city walls and castles etc. Attribute: An Artefact is composed of a set of attributes. An attribute is the physical manifestation of a single human action or single sequence of actions which, in conjunction with others, is directed towards the production of an artefact. Examples are motifs, shapes, edges etc. Attributes exist in different states by either their presence or absence. Attributes can either be seen as quantitative or qualitative. Quantitatively, attributes are seen through measurement and quantity (count) while qualitatively it CDL, University of Maiduguri, Maiduguri 6 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 comprises the material manifestation of variation on a single action. For example, the effects of a soft hammer as opposed to a hard hammer. The importance of a particular attribute is dependent on the subject of the analysis. Thus the firing colour of a pot will be of interest in a study of pottery manufacture but will be of no relevance to a study of the development of forms. Assemblage is a situation when artefacts are found together in direct association. But when a series of assemblages sharing a high proportion of a similar artefact types are found within a defined region, it is said to constitute an archaeological culture. Gordon V. Childe was responsible for the development and application of the concept of archaeological cultures. Culture: culture is peculiarly human. It is the extra-somatic, non-instinctive behaviour of human social groups. Its specific form varies with the particular group. It is universal to all. Culture can be sub-divided into various spheres: social, economic, religious etc. Archaeologists are particularly concerned to explain the processes of culture change, and this can be seen through the following cultural processes:- diffusion and acculturation. Diffusion has been a favourite explanation for culture change. David Clarke (1968:13-14) identified three forms: stimulus, primary and secondary diffusions. Stimulus diffusion is a process whereby repatterning in an assemblage can occur as a response to an external stimulus without involving borrowing or reproduction of a particular trait. Primary diffusion is a process whereby within a culture new elements can be generated at particular points through invention and then be distributed through trade, intermarriage or gift exchange to the whole culture area. Secondary diffusion is a situation where artefacts from one cultural area are often distributed beyond their region of origin by trade or some exchange mechanisms. Acculturation is said to occur when two cultures become increasingly similar as a result of interaction between their respective groups of people by intermarriage, trade or sharing of certain resources. The full development of CDL, University of Maiduguri, Maiduguri 7 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 this process is called cultural fusion. The reverse process, that is the break up of a culture in to two or more, can be called cultural fission. This can occur as communities become isolated from one another by physical barriers. 1.3.3 PROPERTIES OF ARCHAEOLOGY It is now fully recognised that properties of archaeological remains are both natural and human and require two different approaches. As natural objects archaeological remains may be studied by their geometry (shape), physics( weight and magnetic properties); chemistry (Chemical compositions); Biology (Fauna and Flora). The number of natural properties that can be studied is of course infinite. As human objects, archaeological remains are studied primarily from the standpoint of technology (i.e. production of tools), settlement pattern and land for farming and pastoral activities. 1.3.4 RELEVANCE OF ARCHAEOLOGY The Elliot Commission of 1945 on higher education in Nigeria urged for research into the past of west Africa by asserting that: “Researches in the past will not only stimulate local interests in the ancient traditions of the people, but will help to maintain their sense of continuity in the rapid changes now coming upon them” Archaeological findings at sites such as Iwo Eleru in Western Nigeria indicated that the Negroid is in fact the oldest known physical types in West Africa dating back to 11,000bp. The Dufuna canoe dating 8,500 years testify the presence of human activity in form of sea faring, fishing, transportation and haulage along the Yobe valley. The canoe is so far the oldest in Africa and third oldest in the world. Archaeological research on the Bama Ridge at Konduga sand pit indicate the existence of human settlement in this area dating to over 6000 years, ranking among the oldest occupation settlements in West Africa. Archaeological research is making a significant contribution to the peoples knowledge of their CDL, University of Maiduguri, Maiduguri 8 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 prehistory. Findings at Nok and Daima in Northern Nigeria, Igbo-Ukwu in the East, Iwo Eleru, Ife and old Oyo in South West are some of the spectacular sites in Nigeria. 1.3.5 CAREER OPPORTUNITIES Those who graduate or study archaeology are likely, to be engaged in the following jobs: 1. 2. 3. 4. 5. 6. 1.4 Researchers at an Academic Institutes Colleges and Universities Work as Cultural Attaches at our Embassies overseas Work at cultural centres, Arts councils, and National Commission for Museums and Monuments Work as an employee of the customs and excise to check the influx of antiquities out of this country Can work with United Nations Educational, Scientific and Cultural Organisations (UNESCO) A teacher of history, cultural studies, etc. SUMMARY As in all disciplines the world over, specific concepts are used specifically for the discipline towards the understanding of the discipline. The relevance of the discipline will be appreciated by students when portrayed and the career opportunities available. 1.5 SELF-ASSESSMENT EXERCISES 1. What is the relevance of Archaeology to historical study? 2. What is the relationship of Archaeology and other disciplines? 1.6 REFERENCES Kathleen, Kenyon, (1961) Beginning in Archaeology, Dent, London. Glyn Daniel, (1967) “The origins Archaeology”: London Relican Books. CDL, University of Maiduguri, Maiduguri and growth of 9 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Thurstan Shaw, (1963 - Archaeology and Nigeria, Ibadan University press, Ibadan _________ (1964) – “Field research in Nigerian Archaeology, Journal of the Historical Society of Nigeria, 11,4. __________ (1965) - The Approach through Archaeology to Early West African History, Ajayi & Espie, eds. A thousand Years of West African History ed., Ibadan: University Press _______ (1969) – “Archaeology in Nigeria”. Antiquity XLIII, 171, 187-199. 1.7 SUGGESTED READING Neustypny, Evzen (1971) Antiquity XLV 177, 34-39 – “Whither Archaeology”, Deetz, James (1967) An Invitation to Archaeology, Natural History Press. New York. Bassey, W. Andah, (1982) - African Development in Cultural Perspective (with special reference to Nigeria) Occasional Publications of the Department of Archaeology and Anthropology, University of Ibadan. Thurstan, Shaw, (ed) (1975) Lectures on Nigerian Prehistory and Archaeology, Ibadan University Press. Irving Rouse, (1972) - Introduction to Prehistory: A systemic approach, Macgraw-Hill Book co. Richard, A. Gould, (1978) Ethnoarchaeology, University of Albuquerque. – Exploration in New Mexico Press. Clarke, D. L. (1968) Analytical Archaeology. London: Metheun. CDL, University of Maiduguri, Maiduguri 10 HIS 102 – INTRODUCTION TO ARCHAEOLOGY CDL, University of Maiduguri, Maiduguri UNIT: 3 11 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TOPIC 2: TABLE OF CONTENTS PAGES 2.0 TOPIC: HISTORY OF ARCHAEOLOGY - - 11 2.1 INTRODUCTION 2.2 OBJECTIVES 2.3 IN-TEXT - - - - - - 12 - - - - - - - 12 - - - - - - - 12 2.3.1 HISTORY OF ARCHAEOLOGY - - - 12 2.3.2 ARCHAEOLOGY IN NIGERIA - - - 13 - 2.4 SUMMARY - - - - - 14 2.5 SELF- ASSESSMENT EXERCISES - - - - 14 2.6 REFERENCE 2.7 SUGGESTED READINGS - - - CDL, University of Maiduguri, Maiduguri - - - - - - 15 - - - - - 15 12 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 2.0 TOPIC: HISTORY OF ARCHAEOLOGY 2.1 INTRODUCTION UNIT: 3 Archaeology as a systematic discipline is young, with an age of only 200 years in both the old and the New World. 2.2 OBJECTIVES At the end of this topic, you should be able to: i. Determine when archaeology started wide. ii. Determine when it began in Nigeria. world 2.3 IN-TEXT 2.3.1 HISTORY OF ARCHAEOLOGY Archaeological work can be divided into four periods. The old world embraces Near East, India and South East Asia and Africa and the new world represents North and South America and Australasia. Archaeological work can be divided into four periods: 2.3.1.1 THE PIONEERING OR SPECULATIVE PERIOD This period ranges from the 18th and 19th centuries. The first half of the 19th century saw the establishment of the antiquarian societies whose main purpose was to propagate the science of archaeology. Places where such societies were established include England, Wales and Scotland. At the close of the 19th century an antiquarian section was established in the British Museum. 2.3.1.2 THE DESCRIPTION PERIOD CDL, University of Maiduguri, Maiduguri 13 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 This period witnessed the development of the three age systems by C. J. Thomsen and J. J. A Worsea. They described all the inventories in their Museum based on technological age system of Stone, Bronze and Iron. In 1865 the first book on Archaeology was written by John Lubbock. An exposition of human antiquities and archaeological finds took place in 1867. 2.3.1.3 DESCRIPTIVE HISTORIC PERIOD This spans from 1865 to1945. It witnessed the development of stratigraphy in archaeology. Radio Carbon dating was also discovered. In 1806 the first International Conference of Archaeological was held. In 1867 an exposition of archaeological materials was held in Paris. The technique of excavation was developed. Between 1865-1866, around 18731875 photography in field work was introduced. 2.3.1.4 COMPARATIVE – HISTORIC PERIOD It spans from 1950 to the present. This period witnessed archaeologists advancing from asking where and when; to asking how and why things happen? A more rigorous analysis was introduced using ethnographic parallels. 2.3.2 HISTORY OF ARCHAEOLOGY IN NIGERIA Archaeological research in Nigeria can be broken up into three main phases. The first phase is the colonial phase. K. C Murray and E. H. Duckworth in 1934 urged for the establishment of a Nigerian Museum. That appeal led to the formation of the Nigerian Department of Antiquities. Between 1949 and 1950 the Jos Museum was built. Between 1945 and 1955 and 1956/1957 A. J. Goodwin excavated at Benin. Between 1956 and 1957 Frank willet excavated at old Oyo. Between 1959 and 1960 Thurstan shaw excavated at Igbo Ukwu. All these excavations were sponsored by the Federal Department of Antiquities. In 1958 Frank Willet was appointed Archaeologist in the Department of Antiquities and the following year the first Nigerian Archaeologist, Liman Ciroma, was appointed. Graham Connah CDL, University of Maiduguri, Maiduguri 14 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 was appointed in 1961, Robert Soper 1962, Ekpo Eyo 1963, Kunle Oyenuga 1964, A. J. Priddy, 1964, Francis Bassey, Michael Nkanta and Angela Fagg in 1967 Archaeological position was created at the University of Ife in 1962 at the institutes of African Studies. University of Ibadan though the oldest of all the Universities in Nigeria, the Department of Archaeology was created only in 1963 and Thurstan Shaw was appointed to an Archaeology chair in the Institute of African studies of that University. The same year Donald Hartle was appointed Head of Archaeology section at the Department of Archaeology and History at the University of Nigeria Nsukka. Graham Connah and Steve Daniels, joined Thurstan Shaw at Ibadan in 1964, while Paul Ozanne and Kunle Oyenuga joined Ife in 1966 2.3.2.1 THE INDEPENDENCE PHASE This period saw the recruitment of Archaeologists who were academics notably, Thurstan Shaw and Graham Connah at Ibadan, Donald Hartle at Nsukka. In 1965 information flow between Archaeologists working in Nigeria and their colleagues abroad was intensified by the establishment of the West African Archaeological Newsletter. Before then, the journal of the Historical society of Nigeria was used by Archaeologists to publish their results 2.3.2.3 THE CONTEMPORARY PHASE This phase has experienced or witnessed the proliferation of Archaeology units either subsumed in the Department of History or Anthropology at some of the Federal Universities. It also witnessed the establishment of Museums in various parts of the country, under the auspices of the National Commission for Museums and monuments. The forum for information flow of Archaeologists in the country was created by the establishment of the Archaeological Association of Nigeria and the West African Archaeological Association. 2.4 SUMMARY The study of Archaeology as a systematic discipline started very recently. But archaeological interest began in CDL, University of Maiduguri, Maiduguri 15 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 the 18th and 19th centuries which culminated into the periodisation of the discipline was categorized into phases. 2.5 SELF-ASSESSMENT EXERCISES 1. 2.6 Give a detail history of the beginning of Archaeology world wide REFERENCES Andah, B. W. (1980) Whither Scientific Archaeology in Nigeria (Or the Place of Archaeology in Nigeria). Radio Nigeria, October, Lectures. Arkell, A. J. (1994) “Archaeological Research in West Africa”: Antiquity XVIII, 147-50 2.7 SUGGESTED READING Thurstan Shaw (1964) Archaeology and Nigeria, Ibadan University Press, Ibadan. ___________ (1969) Archaeology in Nigeria, Antiquity XLIII, 1969; 187-199 ___________ (1975) Discovering Nigeria’s Past, Oxford University Press, Ibadan. Effah Gyamfi (n.d.) Archaeology and Cultural Education in Nigeria, the Proceedings, of the 4th Annual Conference of the Archaeological Association of Nigeria, Published by the Editorial Board of West African Journal of Archaeology, Dept of Archaeology and Anthropology, University of Ibadan. CDL, University of Maiduguri, Maiduguri 16 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TOPIC 3: TABLE OF CONTENTS PAGES 3.0 TOPIC: METHODS IN ARCHAEOLOGY - - 16 3.1 INTRODUCTION 3.2 OBJECTIVES 3.3 IN-TEXT - - - - - - - 17 - - - - - - - 17 - - - - - - - 17 - - 17 - - 18 3.3.1 METHODS IN ARCHAEOLOGY 3.3.2 SUBSTANCES FOUND IN ARCHAEOLOGICAL RECORDS 3.3.3 WHAT DETERMINES THE PRESERVATION OF ARTIFACTS - - - 18 SUMMARY - - - - 19 3.5 SELF- ASSESSMENT EXERCISES - - - - 19 3.6 REFERENCE 3.7 SUGGESTED READINGS - CDL, University of Maiduguri, Maiduguri - - 3.4 - - - - - - - - 19 - - - - - 19 17 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 3.0 TOPIC: METHODS IN ARCHAEOLOGY 3.1 INTRODUCTION UNIT: 3 We will study in this topic, various substances that are obtained in archaeological record and how they can be preserved. 3.2 OBJECTIVES At the end of this topic, you should be able to: i. Identify various remains and how they make an imprint as an archaeological evidence. ii. Know how these remains are preserved and the various circumstances surrounding their preservation. 3.3 IN-TEXT 3.3.1 METHODS IN ARCHAEOLOGY Since Archaeology is a method of recovering information from the material remains left by former inhabitants, it is pertinent to identify what these remains are and how they make an imprint as an archaeological evidence. These remains consist of cadaver or skeletons of human beings. Usually, the flesh decays rapidly leaving the skeletal parts but in a suitable situation a human body can be preserved especially in a waterlogged condition which is airtight. Some of the remains also include caves, houses and palaces. Some of these structures survive much longer due to the structural materials used in their construction. It is interesting to note that nomadic habitats are hard to come by in archaeological record. Other remains include people’s rubbish, heaps or refuse which ultimately results in the formation of mounds; thus archaeology is often tagged the “science of rubbish”. Remains such as fortifications in the form of earthworks, defence walls and ditches or religious remains such as mosques, churches, temples and shrines are also sources of archaeological evidences. Workshops of tools and weapons CDL, University of Maiduguri, Maiduguri 18 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 exhibit objects manufactured for human use and may include stone tools, iron smelting sites etc. Domestic utensils include pots, metals etc. Pottery is the most ubiquitous materials obtained at all archaeological sites. 3.3.2 SUBSTANCES FOUND IN ARCHAEOLOGICAL RECORDS All archaeological materials obtained either from the surface or through excavations are made up of different substances. These include the following: stone, metal, baked clay, rock surfaces and organic materials. Stone: This material was widely used by man during the prehistoric age. Most of the stone tools and implements which survive came from the stone age as the name implies. The substance used by prehistoric populations include pebble tool, a hammer stone, scraper, pick, points, microliths and segments etc. Metal: man used this material in the last 10,000 years. It includes bronze, brass, iron and gold. Baked clay: This is the most ubiquitous material produced and used by prehistoric populations, which survive up to this day. They include pottery, figurine and terracotta. Rock Surfaces: This is in a form of rock painting and engraving depicting the artistic skills of the pre-historic populations and have a lot of meanings associated with the depiction. Organic materials: These include wood, leather, calabash, animals and vegetable fibres, and they are hardly preserved in archaeological record, but in a situation where they are revealed, various circumstances work towards their preservation. 3.3.3 WHAT DETERMINES THE PRESERVATION OF ARTEFACTS? 1. Nature of the material: Skeletal remains lasts longer than flesh. Stones and baked clay survives much more longer than organic materials. A metal such as gold is almost indestructible. Copper and bronze corrode easily to a green colour whereas iron often rusts away to a stateless mass. 2. The chemical circumstances in which remains are found: Some materials survive better than the others due to their CDL, University of Maiduguri, Maiduguri 19 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 nature and at times due to the nature of the environment in which they are formed. Under extremely dry conditions or in certain waterlogged situations, flesh and hair may be preserved. In some cases flesh may be artificially preserved by burial practices such as mummification as obtained in ancient Egypt. Organic materials such as calabash and textiles may be preserved as a result of their close association with Copper or Bronze which serve to prevent the destructive action of termites and bacteria. 3. The customs and practice of ancient populations: If a community expose their dead on a hill or a tree without undergoing the conventional burial in a pit as their customs and practices dictates, the whole physical remains will never be left for the archaeologists to study. But on the other hand, if there is an elaborate mortuary practices such as the building of tombs, pyramids as obtained in ancient Egypt, a great deal of information will be preserved. It will be difficult to obtain information on nomadic populations, for obvious reasons. 3.4 SUMMARY This chapter identified the various substances obtained in archaeological record and how far they can be preserved based on their nature and their state of preservation. 3.5 SELF-ASSESSMENT EXERCISES 1. 3.6 Refer to the publication of Thurstan Shaw’s work “unearthing Igbo-Ukwu” and identify why certain items were preserved in archaeological record? REFERENCES Thurstan Shaw (ed) (1975) Lectures on Nigerian Prehistory and Archaeology, Ibadan: Ibadan University Press. 3.7 SUGGESTED READING ______ (1977) Uneathing Igbo Ukwu, Oxford University Press, Ibadan. CDL, University of Maiduguri, Maiduguri 20 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TOPIC 4: TABLE OF CONTENTS PAGES 4.0 TOPIC: DISCOVERY OF EVIDENCE - - - 20 4.1 INTRODUCTION 4.2 OBJECTIVES 4.3 IN-TEXT 4.3.1 - - - - - - 21 - - - - - - - 21 - - - - - - - 21 DISCOVERY OF EVIDENCE- - - 21 - 4.4 SUMMARY - - - - - 24 4.5 SELF- ASSESSMENT EXERCISES - - - - 24 4.6 REFERENCE 4.7 SUGGESTED READINGS - - - CDL, University of Maiduguri, Maiduguri - - - - - - 24 - - - - - 25 21 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 4.0 TOPIC: DISCOVERY OF EVIDENCE 4.1 INTRODUCTION UNIT: 3 In this topic, we will identify the various methods used in the discovery of sites and features. 4.2 OBJECTIVES At the end of this topic, you should be able to: i. Distinguish the various ways in which sites or features are revealed. ii. How sites are identified? 4.3 IN-TEXT 4.3.1 DISCOVERY OF EVIDENCE It is difficult to generalise methods used in the discovery of archaeological sites. Sites vary in their physical characteristics, their state of preservation and environmental setting. One of the primary sources for the discovery of sites is through natural or artificial erosion of deposit or through river or stream action or human interference such as farming, ploughing and construction. Running water erodes and deposits materials and constantly expose and mask other geological features. Be that as it may archaeological sites are identified using four main methods. They are as follows: 1. By accident 2. By fieldwork or reconnaissance survey 3. By aerial photography 4. By detection devices 4.3.1.1 BY ACCIDENT Most Archaeological sites and finds all over the world have been identified by laymen i.e. non archaeologists through accidental means. Finds are stumbled upon accidentally, whenever the surface of the ground is turned over as in the case of farming, ploughing, digging foundation for building and laying CDL, University of Maiduguri, Maiduguri 22 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 of pipes etc. Anyone engaged in such activity is likely to come across archaeological finds. For this reason, it is important for people to be sensitised and report any artefact identified in the course of their activities and report accordingly. The greater the number of accidental discoveries that are reported to the archaeologists, the greater the knowledge that we shall posses concerning our unwritten past. In Nigeria such discoveries should be reported as soon as possible to the Local Government Areas or to the State Government, where the find is made or any university close by and the National Commission for Museums and Monuments. Important sites discovered through accidental means include the following: Mai Idon Toro and Nok discovered as a result of tin mining operations in the Jos plateau. Igbo-Ukwu was discovered in 1939 as a result of digging a cistern by two brothers Isaiah and Richard in their compounds. The Dufuna canoe was discovered by Mal. Ya’u, a Fulani, cattle rearer in the course of digging a water well for his cattle in Yobe State of Nigeria. in 1987. 4.3.1.2 BY FIELDWORK OR RECONNAISSANCE SURVEY Fieldwork entails two main operations; recognition and recording. Recognition involves that of artefacts, spectacular features and ability to distinguish ancient sites from the most recent ones. Recording usually comprises of a mixture of verbal description, measurements and photography. Before the commencement of any fieldwork investigations, the Archaeologists is expected to equip himself with the necessary map of the area to be familiar of the geography of the area to be searched. Whenever a researcher embarks on a fieldwork, he must observe the geological features around; search for oral information from the indigenous inhabitants close to the site, contact nomads and where necessary who usually traverse the landscape. Fieldwork in most cases is a deliberate attempt to expose the environment and identify features. An aspect of fieldwork is the grid and system walking, whereby the whole landscape to be searched is gridded (divided into sectors). Each CDL, University of Maiduguri, Maiduguri 23 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 sector is systematically searched by either a single Archaeologist operating on a strictly controlled sector, or by a small group of Archaeologists moving at a uniform pace over the sectors so that no areas are missed. 4.3.1.3 BY AERIAL PHOTOGRAPHY The use of aerial photography was pioneered between 1914 and 1918 during the First World War by Major G.W.G. Allen and O.G.S. Crawford. Aerial Photography has, without question made the greatest contribution of any method yet devised into the discovery of archaeological sites particularly in Britain. The aerial photography taken during the First World War was meant to identify enemy activity, but it provided the opportunity to interpret features of more ancient origin and from this point the theory of aerial photography as a source for the discovery of archaeological sites emerged. The technique depends upon the character of the remains. Features in relief such as ditches, mounds and walls are visible on the ground, but an observer is unlikely to pick up the minute depressions or elevations from a vantage point which may either be too close to the features to see it in perspective or too far from the feature to recognise its existence. The aerial camera will be able to disclose sites which may be unlikely visible to the naked eye. Aerial photography has become an important aid to archaeologists but unfortunately, it is of very little use in heavily forested areas such as the extreme south of Nigeria. 4.3.1.4 BY DETECTION DEVICES This involves the use of electrical resistivity and proton magnetometer. Electrical Resistivity: This system was initially developed for geological prospection as well as civil engineering. The principle is as follows: That rocks and soils conduct electricity mainly through the presence of moisture which contains mineral salts in solution. Differences in structural features beneath the ground may be detected by variations in the resistance of the ground to a flow CDL, University of Maiduguri, Maiduguri 24 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 of electricity. The resistance meter detects the presence of a feature by causing the current pattern to be distorted, indicative of a structural features in situ”. This type of instrument will be able to detect buried walls, ditches or pits etc. (Coles, J. 1972). Proton magnetometer is a technique used for locating features over a restricted area. It can locate areas with fired materials such as Kilns, furnaces, ovens, hearths, structures and iron working sites. The above two mentioned instruments are not in use in Nigeria only recently the electrical resistivity instrument was used by a German Archaeologists at a site, Zilum, in Borno. It should be noted that the instruments are principally useful in ascertaining the details of a site already discovered without having to excavate the whole area, rather than in discovering the site in the first instance. 4.4 SUMMARY This chapter identified the various methods used in the discovery of sites and features such as by accident, by fieldwork, by aerial photography and detection devices. 4.5 SELF-ASSESSMENT EXERCISES 1. Enumerate possible ways of identifying archaeological sites 4.6 REFERENCES Aitken, M. (1974)-Physics and Archaeology, 2nd ed. New York: Inter Science Publications. Alexander, T. (1970) - The Directing of Archaeological Excavations, London: John Baker CDL, University of Maiduguri, Maiduguri 25 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Brothwell, and Higg (ed) (1969) - Science in Archaeology. 2nd ed. London: Thames and Hudson. Atkinson, R. J. C. (1953) - Field Archaeology. 2nd ed. London: Methuen. Binford, L. E. (1972) - An Archaeological Perspective: New York. Bradford, J. (1957) - Ancient Landscape, studies in Field Archaeology London Bell. Butzer, K. W. (1971) - Environment and Archaeology 2nd ed. London Metheun Chang, K. C. (1967) - Rethinking Archaeology, New York: Random House Childe, V. G. (1942) - What happened in History, London: Penguin. __________________ (1956) - A short Introduction to Archaeology: London Muller. __________________ (1956) - Piecing Together the past, London: Routledge and Kegan Paul. Clark, J. G. D (1957) - Archaeology and Society 3rd ed. London: Methuen. __________________ (1969) - World Pre-history 2nd ed. Cambridge University Press _________________ and Piggott, S. (1965) - Pre-historic Societies: London: Hutchinson Clarke, D. L. (1968) - Analytical Archaeology, London: Methuen CDL, University of Maiduguri, Maiduguri 26 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 ____________________ (ed) (1972 - Models in Archaeology. London: Methuen 4.7 SUGGESTED READING Coles, J. (1972) - Field Archaeology in Britain, London: Methuen. Crawford, O. G. S. (1953 - Archaeology in the field, London: Bent. Daniel, G. (1962) - The idea of Pre-history, London: Penguin _____________ (1967) - The Origin and Growth of Archaeology, London: Penguin. Deetz, J. (1967 - Invitation to Archaeology. New York: American Museum of Natural History. Fryer, D. H. (196)1 - Surveying for Archaeologists. 2nd ed. Durham: University of Durham press Heizer, R. F. (1966) - A Guide to Archaeological Field methods: 3rd ed. Palo Alto California University Press. ______________and Graham, J. A. (1967) - A Guide to Field Methods in Archaeology, Palo Alto, California University Press. _______________ and Cook, S. F. (eds) (1960) - The Application of Quantitative methods in Archaeology, Viking fund publications in Anthropology, 28. Hole, F. and Heizer, R. F. (1973) - An introduction to PreHistoric Archaeology 3rd ed. New York: Holt, Rinehart and Winston. Kenyon, K. M. (1964) - Beginning in Archaeology, London: Bent. Piggott, S. (1959) - Approach to Archaeology. London: A & C Black Pyddoke, E. (ed) (1963) - The Scientist and Archaeology. London: Bent. Wheeler, R. E. M. (1954) - Archaeology from the Earth, London: Oxford Walu, L. D. (2001) - Basic Archaeology, Jos Mazlink Nigeria Limited. Bassey, W. Andah and Okpoko A. I. (1994) - Practising Archaeology in Africa. Wisdom Publishers Ibadan CDL, University of Maiduguri, Maiduguri 27 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 Sowunmi, M. A. Folorunso L. A and Aremu D. A. (2001) Basics in Archaeological and Anthropological principles, Theories and methods, Dept. of Archaeology and Anthropology, University of Ibadan. CDL, University of Maiduguri, Maiduguri 28 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TOPIC 5: TABLE OF CONTENTS PAGES 5.0 TOPIC: EXCAVATION - - - - - 27 5.1 INTRODUCTION - - - - - - 28 5.2 OBJECTIVES - - - - - - - 28 5.3 IN-TEXT - - - - - - - 28 - - - - - 28 - 5.3.1 EXCAVATION 5.3.2 MAIN AIMS OF EXCAVATION - - 29 5.3.3 TYPES OF EXCAVATION - - - 29 5.3.4 RECORDING 31 - - - - - - 5.4 SUMMARY - - - - 32 5.5 SELF- ASSESSMENT EXERCISES - - - - 32 5.6 REFERENCE 5.7 SUGGESTED READINGS - - - - CDL, University of Maiduguri, Maiduguri - - - - - 32 - - - - - 32 29 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 5.0 TOPIC: EXCAVATION 5.1 INTRODUCTION UNIT: 3 In this topic, we highlight the aim of excavation and enumerate its various types. 5.2 OBJECTIVES At the end of this topic, you should be able to: i. Determine the aims of excavation. ii. The various types of excavation. 5.3 5.3.1 IN-TEXT: EXCAVATION Archaeological investigations are usually conducted by students, local archaeological societies, museums and university departments of archaeology. No excavation, on whatever scale, should be attempted unless all of the known archaeological problems have been considered and an approach to the answers suggested. The problems are not purely ‘excavational’ but include all legal matters as well as those of financial and staff support. Before embarking on archaeological investigation in any part of Nigeria, permission must be sought from the National Commission for Museums and Monument, the State and Local Government area where the site is located. The excavation team must consist of a Director whose role includes the appointment of supervisors and workers of various kinds. Excavation is a scientific technique to be learned by experience and application. Some excavations are designed not only to yield new information about a site, but also to provide training of potential archaeologists. Instruction is usually the aim of some excavations, as well as actual digging techniques. CDL, University of Maiduguri, Maiduguri 30 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 5.3.2 MAIN AIM OF EXCAVATION The main aim of excavation is the recovery of data that can throw light upon man’s part. Every excavation is planned to answer a limited number of definite questions. The questions may relate to the position of a site, its external and internal features and its contents. 5.3.3 TYPES OF EXCAVATION There are two types of excavations: vertical and Horizontal. vertical excavations. This include test pitting and trench excavation. The main aim of this excavation is to reveal in cross section the depth, sequencing and composition of archaeological remains. Test excavation serves as a control pit which enables archaeologists to study the nature of the soils and deposits in an undisturbed state. It serves as a reference or control to the areas not disturbed or tempered by man. It usually probes the full depth of a deposit in a vertical sense, not its horizontal extent. A test pit can only accommodate one excavator or two depending upon the dimension. That is to say if the dimension of the pit is only 1 square metre it will accommodate a single excavator, and if it is 2 square metre it will be able to accommodate two excavators. Test pit is usually conducted to sample the subsurface artefacts and ecofact to obtain a cross sectional view of the sites depositional history. It is usually the preliminary excavation at any given site to determine the site potentials, and is usually outside the main areas of known or suspected archaeological interests. The limitation of test pit is that it lacks horizontal dimension. The trench excavation is a narrow linear excavation meant to expose both the full vertical and horizontal extent of a deposit in one direction. It resembles test pit often by having a dimension of 1 to 2 meters wide to cut through the feature being probed. Trenches thus explore both vertical accumulation and horizontal association. It serves as a prelude to more extensive lateral excavations. It is useful in probing features like mounds as obtained in Borno i.e. Daima mound or the Tells of the Near East. CDL, University of Maiduguri, Maiduguri 31 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 5.3.3.1 HORIZONTAL EXCAVATIONS This include clearing and stripping excavation. These methods aim at horizontal investigation of deposits and to reveal in plan view both the horizontal extent and the arrangement of an archaeological deposit. Clearing excavations are meant to expose in plan view the nature and extent of subsurface archaeological data. It is conducted only after test pitting has revealed the basic stratigraphic relationships of the site. It is used to expose the horizontal extent of data with the vertical stratigraphic record preserved in baulks. Baulks are unexcavated divisions between excavations. Vertical excavation is slowly and steady giving way to clearing excavations because much larger horizontal areas are being investigated at one time. Clearing is done across the square by peeling away the soils to reveal the horizontal distribution of remains within the square at that stratigraphic level, and this can be recorded and all the features removed and the next lower level is exposed. This goes on until the excavator reaches the sterile layer (layer i.e. devoid of cultural materials). Stripping excavation is conducted to clear large areas and expose spatial distributions of data, such as foundations of large buildings and entire settlements. It is usually conducted with mechanical equipment as it involves extensive remains. 5.3.3.2 OTHER TYPES OF EXCAVATIONS: There are a number of other types of excavations which include Rescue, Treasure Hunts, Research, Experimental, and under water excavations. Rescue excavation: is usually conducted, when a site or a feature is stumbled upon accidentally, and in order not to be destroyed and loose all the records, archaeologists are contacted impromptu to record and rescue the site in question. For example, when work on the Hydro Electrical Power Station at Kainji was about to commence in1963, a rescue operation team of Archaeologists from the U.S.A. carried out a rescue operation. CDL, University of Maiduguri, Maiduguri 32 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 This also happened with Abuja, when declared a capital territory and construction work started. Treasure hunts evolved out when archaeology was at its infancy in most parts of the world. Most of those who pioneered excavations were not trained archaeologists, but antiquarians; (i.e. those who seek for artefacts for their material value), but not as an academic pursuit. Such antiquarians ransacked these objects and took them to Europe and America. Leo Frobenius a German ransacked the Benin Palace in 1896 and took valuable objects to Europe. Research excavation is carried out on a specialised area concerning the prehistoric past. It can be of short or long term project. Experimental excavation; deals with experimental technique, using new and interested methods of digging, recording and sampling of site. It exposes students and researchers to new and ongoing techniques. Under water excavation uses several methods adopted from land archaeology. Aerial photography over large body of water may reveal outlines of sunken ships, and settlements. Sonar scanning helps detect under water objects by the reflection of sound waves. Divers use metal detectors to uncover metal objects. Tools used by Archaeologists use wide range of tools, from heavy duty machines, such as tractors and lifters to the commonest small tools such as pick for digging and cutting, the spade used for throwing up the soil, the shovel for the removal of soil, the fork for loosening the soil, the trowel for cleaning excavation edges, and the sieve to recover extremely small objects by sieving. 5.3.4 RECORDING Any slight advance in the course of excavation recording takes place by either the Pen or the camera. Objects obtained in CDL, University of Maiduguri, Maiduguri 33 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 a specific layer or spit level are grouped together and bagged for several analyses. Soil samples are collected and analysed in the laboratory to detect pollen grains which can give us the history of human occupation and activity such as farming, in a particular area. Preservation special care must be taken to preserve objects made of such materials as metal, wood, cloth or leather. For example, rusts on metal objects should be removed without damaging the object. Wooden objects like the Dufuna canoe, which was water-soaked, may crack or loose its shape when exposed to the air. It therefore, has to be preserved in a water medium in combination with formalin and polyethnol glycol (peg). A specialist called Conservator takes care of the preservation exercise. 5.4 SUMMARY The aim of excavation is highlighted. The various types of excavation enumerated and the painstaking effort of recording and preservation studied. 5.5 SELF-ASSESSMENT EXERCISES 1. 5.6 How is excavation conducted? REFERENCES Bassey, W. Andah and Okpoko A. (1994) – Practising Archaeology in Africa. . Ibadan: Wisdom publishers Limited. David Browne (1975) - Principles and Practice in Modern Archaeology. Ibadan: Hodder and Stoughton. 5.7 SUGGESTED READING Thurstan Shaw (1975) - Lectures on Nigerian Prehistory and Archaeology Ibadan: University Press. Walu L. D. (2001) Basic Archaeology, Jos: Mazlink Nigeria Limited, CDL, University of Maiduguri, Maiduguri 34 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TOPIC 6: TABLE OF CONTENTS PAGES 6.0 TOPIC: DATING IN ARCHAEOLOGY - - 33 6.1 INTRODUCTION 6.2 OBJECTIVES 6.3 IN-TEXT 6.3.1 - - - - - - 34 - - - - - - - 34 - - - - - - - 34 DATING IN ARCHAEOLOGY - - 34 - 6.4 SUMMARY - - - - - 37 6.5 SELF- ASSESSMENT EXERCISES - - - - 37 6.6 REFERENCE 6.7 SUGGESTED READINGS - - - CDL, University of Maiduguri, Maiduguri - - - - - - 37 - - - - - 37 35 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 6.0 TOPIC: DATING IN ARCHAEOLOGY 6.1 INTRODUCITON UNIT: 3 We study here, the recorvery of the data and its ultimate datation as the most fundamental aspect in determining and antiquity of the object. 6.2 OBJECTIVES At the end of this topic, you should be able to: i. Know the importance of dating. ii. Different methods of dating. 6.3 6.3.1 IN-TEXT DATING IN ARCHAEOLOGY Having acquired an artefact from a site, a side from its preservation, the next stage is dating; to determine the age of the find. There are two principal methods of dating: These are Relative and Absolute. Relative dating gives information about the age of an object in relation to other objects. Thus relative dating does not give actual dates but a comparison; whereas absolute dating determines the age of an object in years, but it cannot also give an exact date as history does. In contrast to relative dating absolute dating gives a level of probability that a certain event took place at some point within a stated span of years. 6.3.1.1 RELATIVE DATING There are two types of relative dating. They are sequence dating and cross dating. Sequence dating is the attempt to establish the relative chronological position of a series of archaeological units or phases. Cross dating presupposes that a sequence of archaeological units have already been established; and the exercise here is to determine the relative position of the CDL, University of Maiduguri, Maiduguri 36 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 newly recovered component by correlation with a similar component already sequencely dated. For example, if we find smoking pipes on a site in West Africa, we can say with confidence that it is not earlier than 17th century, because the habit of smoking with the aid of pipes was not introduced from outside before that date. The study of fossil pollen called palynology is a tool in providing relative dating. Pollen grains of trees, grass and plants are invisible to the naked eye, when they fall to the ground. But when visualised under a microscope they give a reflection of the surrounding vegetation. Thus by studying the pollen at different soil levels, it is possible to obtain information about changes in the natural flora and changes produced as a result of man’s interference with nature, such as when the practice of agriculture began. 6.3.1.2 ABSOLUTE DATING There are several methods of absolute dating. They include dendrochronology, varves, radiocarbon, potassium argon, fissiontrack, Thermoluminescene, and obsidian. Dendrochronology:- (Tree ring dating) – Tree ring growth is an annual event occurring especially in temperate regions according to prevailing climatic conditions. The bristle cone pine tree in the U.S.A. provides a sequence of rings up to 1000 years. In the very dry areas too, where wood is well preserved, it may be possible to arrive at an exact tree ring dating in years by counting the tree rings. It gives also seasonal variations. For example; with abundant rainfall, rings may be wider while scanty rains attract a narrow ring growth. Thus by using a core extraction technique, it is possible to tell the age of a tree. Varves dating applies to glacier or clay deposit laid down as a result of a marked annual wet and dry season. In favourable circumstances using a core extractor, glacier or clay deposit can be counted in the same manner as that of tree rings. Radio carbon dating is the most widely used method of dating. The principle is as follows. Carbon originates as the indirect result of the bombardment of the earths CDL, University of Maiduguri, Maiduguri 37 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 atmosphere by cosmic rays. The carbon has 14 particles in its nucleus thus christened C14. Carbon 14 mixes with the carbon dioxide in the atmosphere and is absorbed by all plants and living things. The proportion of C14 remains the same during the life of the organism. However, as soon as a given organism dies, the proportion of C14 begins to change. Thus, since the C14 continues its decay and is no longer replaced, by measuring the proportion of C14 in any piece of dead organic matter, it is possible to arrive at the length of time that has elapsed since death took place. Items used in C14 dating include wood, bone, shell, leather, textile and charcoal. Radiocarbon age is a statement of statistical probability not an accurate date. That is why it carries the + standard error; the date given as AD 1000 + 100 means that there are too chances that the actual date lies between AD900and AD 1100. The effective range of C14 dating is from about 50,000 years to a 100 years ago. Potassium argon dating covers nearly the whole range of the time scale and is useful for dating materials not older than 100,000 years, especially when archaeological artefacts are found in association with geological materials. About 2.8% of the earths crust is made up of potassium. The high percentage of potassium (K) in most rocks allows for accurate dating, Radiocarbon age provided the early dating for hominid fossils at olduvai Gorge in Tanzania. Fission Track dating is a geochronological technique that has important archaeological applications. The effective limits is 100,000 to 1,000,000 years like potassium-argon. Fission track dating is applied to newly formed rocks. One of the most famous applications of fission track dating to archaeology is the dating of volcanic obsidian from Bed 1 at Olduvai Gorge. The result was a standard deviation value of 2.03+0.28 million years. Thermoluminescene dating is associated with the effects of high energy radiation, i.e. alpha, beta and gamma rays emitted as a result of decay of radioactive impurities in pottery. The method can be applied to pottery not older CDL, University of Maiduguri, Maiduguri 38 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 than 6,000 B.C. and possibly to volcanic lavas, stone artefacts of flint and obsidian manufacture. Obsidian dating this method of dating were designed by Friedman and Smith in 1959. The principle of the dating is the establishment of hydration rates for specific archaeological regions. Method involved in calculating hydration rates applies universally to obsidian hydration. Obsidian dating is advantageous to archaeology as many dating can be accomplished within a relatively rapid time with little cost and the object being dated is the artefact itself. Large number of dates can be processed for any given assemblage or site. The end result of all excavated archaeological materials is cataloguing, reporting of research results, conservation, exhibition and storage in a museum. 6.4 SUMMARY Having undergone excavation, the recovery of the data and its ultimate datation remains the most fundamental in determining the antiquity of the object and how significant it is to world heritage. Several aspects of dating have been mentioned which is employed in the dating of one substance or another. 6.5 SELF-ASSESSMENT EXERCISES 1. 6.6 Identify the various methods of dating in archaeology REFERENCES Bassey, W. Andah and Okpoko A. (1994) – Practising Archaeology in Africa. Ibadan: Wisdom publishers Limited. Thurstan Shaw (1975) - Lectures on Nigerian Prehistory and Archaeology Ibadan: University Press. CDL, University of Maiduguri, Maiduguri 39 HIS 102 – INTRODUCTION TO ARCHAEOLOGY 6.7 UNIT: 3 SUGGESTED READING Walu L. D. (2001) - Basic Archaeology, Jos: Mazlink Nigeria Limited. CDL, University of Maiduguri, Maiduguri 40 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 SOLUTIONS TO EXERCISES TOPIC 1: 1. study? What is the relevance or archaeology to historical Answer – Archaeology as a scientific tool of investigation recovers data that history uses in determining the historical background environmental setting and the antiquity of the artifacts that is recovered, emphasing on man – land relation. Any discovery is seen as a societal heritage. 2 What is the relationship of Archaeology and other disciplines? Answer – Archaeology can be described in relation to the remains obtained which are both natural and human. As natural objects archaeological remains may be studied be their geometry (shape) physics (weight and magnetic properties chemistry (chemical composition) Biology (Fauna and Flora). The relationship or archaeology to either history or anthropology is infinitesimal. TOPIC 2: 1. Give a detail history of the beginning of Archaeology worldwide. Answer – The history of archaeology worldwide can be phased or speculative period which ranges form 18th to 19th C, saw the establishment of antiquarian societies. The descriptive period witnessed the development of the three age systems of stone, Bronze and Iron. The descriptive historic period spans form 1865 to 1945 saw the development of stratigrapy in archaeology and the discovery of radio carbon CDL, University of Maiduguri, Maiduguri 41 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 dating. The comparative historic period spans form 1950 to date witnessed archaeologist advancing form asking where and when; to asking how and why things happen? TOPIC 3: 1. Refer to the publication of Thurston shows work “Unearthing Igbo-Ukwu” and identify why certain items were preserved in archaeological record? Answer – Textile found in close contact with copper or bronze can survive in the ground for many hundreds of years. TOPIC 4: 1. Enumerate possible archaeological sites. ways of identifying Answer – Archaeological sites can be discovered using four methods as follows: by accident, by fieldwork, by aerial photography, and by detection devices. TOPIC 5: 1. How is excavation conducted? Answer – There are several ways of conducting excavation. Every excavation is planned to answer a limited number of definite questions. Excavation can be conducted either by spit level of 10cm, or 20cm or more or by going direct to the cultural layers. TOPIC 6: 1. Identify the various methods of dating in archaeology. Answer – There are several methods of dating. There are relative dating, gives information about the age of an object in relation to other objects and there are absolute dating that determines the age of an object in years. Each of these broad methods of dating have minor means of dating within them, e.g. absolute CDL, University of Maiduguri, Maiduguri 42 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 dating has types of dating such as dendrochronology, varves, radiocarbon, and potassium argon e.t.c. CDL, University of Maiduguri, Maiduguri 43 HIS 102 – INTRODUCTION TO ARCHAEOLOGY UNIT: 3 TUTOR-MARKED ASSIGNMENTS 1. Define Archaeology, Prehistory, Proto-history and history and in the process identify areas where they relate and differ. 2. Enumerate the various substances obtained in archaeological record and for each identify its preservation properties. 3. Enumerate with examples the various ways of identifying archaeological sites. 4. Explain in detail the various procedures involved in excavating an archaeological site. 5. Define the following concepts with illustrations sub-surface, Baulk, sterile layer. CDL, University of Maiduguri, Maiduguri 44