Name: _______________________________________
GY 112 LAB EXAM 2 PRACTICE TEST
D. Haywick (Spring 2008)
worth 15%
Note: The actual lab test will consist of 5 ”stations”. Most stations will consist of 3 or more questions pertaining to either a suite of samples or
an Earth history lab concept (writing question). Each station is of equal value. During the actual test, you have 3 minutes per station to answer the
questions for that station then you will be asked to move to the next station. The exam will take 15 minutes. At the end of the test, you will have
5 minutes to tweak any writing questions that you have to finish. Be sure that you read the questions carefully before you start them, otherwise
you could find yourself doing a lot more work than is necessary. ANSWER ALL QUESTIONS. Total number of points possible: 25+1 bonus
Station 1: Fossils. This station consists of 2 fossil specimens in 2 boxes.
a) Is sample 1a a body fossil or a trace fossil? _______________________________________________(1 point)
b) What is the mode of preservation of specimen 1a? _________________________________________ (1 point)
c) Is sample 1b a body fossil or a trace fossil? _______________________________________________(1 point)
d) What is the mode of preservation of specimen 1b? _________________________________________ (1 point)
e) What mineral is specimen 1 a made of? __________________________________________________ (1 point)
Station 2: Sedimentary Rocks. This station consists of 3 unlabelled specimens.
a) What is the proper sedimentary name of specimen 2a?_____________________________________ (1 point)
b) What is the proper sedimentary name of specimen 2b?_____________________________________ (1 point)
c) What is the proper sedimentary name of specimen 2c?_____________________________________ (1 point)
d) What was the environment of deposition for specimen 2b?__________________________________ (1 point)
e) What was the paleoclimate like when specimen 2a was being deposited?_______________________ (1 point)
Station 3: Writing question. Compare and contrast borings and burrow.
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
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Station 4: Fossils and Rocks This station consists of two unlabelled specimens.
a) What class of sedimentary rock is specimen 4a? __________________________________________ (1 point)
b) What is the proper sedimentary rock name for specimen 4a?_________________________________ (1 point)
c) Specimen 4 a contains several fossils. What is/are their mode(s) of replacement? (There may be more than one
correct answer)
_________________________________________________________________________________ (2 points)
d) How are the fossils in specimen 4b preserved? ____________________________________________ (1 point)
Station 5: Sedimentary rocks This station consists of 2 unlabelled specimens.
a) What is the proper geological name for specimen 5a? _______________________________________ (1 point)
b) What is the proper geological name for specimen 5b? _______________________________________ (1 point)
c) What is the most likely depositional environment for the specimens?
5a____________________________
5b____________________________ (2 points)
d) What causes the color in specimen 7a? ________________________________________ (1 point)
SEDIMENTARY ROCKS TO BE FAMILIAR WITH FOR THIS EXAM
Quartz arenite
lithic sandstone
arkose
greywacke
conglomerate
breccia
shale (red, black, green)
fossiliferous limestone
coquina
chalk
oolite
coal
amber
halite
For this exam: no siltstone, no non-fossiliferous limestone,
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