A LEVEL GEOLOGY UNIT TEST
SEDIMENTARY ROCK FORMING PROCESSES
1
What are the characteristics of
a) mineralogically immature sediments?
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b) texturally immature sediments?
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2
Give two examples of depositional environments in which you would expect to
find immature deposits.
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3
What are the characteristics of:
a) mineralogically mature sediments?
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b) texturally mature sediments?
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4
Give two examples of depositional environments in which you would expect to
find mature deposits.
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5
Give two examples of physical weathering processes.
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6
What is the most abundant product of physical weathering?
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7
Briefly explain (using examples) the chemical weathering processes of:
a) Hydrolysis.
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b) Carbonation
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c) Oxidation
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8
What is the most abundant product of chemical weathering?
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9
In what type of climate would you expect to find the most intense chemical
weathering
- explain your answer.
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10
Describe four ways in which a river may transport its load.
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11
How does a glacier erode?
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12
Why do wind blown sands have such a distinctive texture?
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13
What is the relationship between distance of transport and texture?
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14
Sketch a simple graph to illustrate the relationship between
erosion/transport/deposition and current velocity.
15
Explain the process of flocculation.
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16
What conditions favour the precipitation of calcium carbonate, both chemically
and biogenically?
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17
What conditions favour the accumulation of large volumes of organic matter
(ie peat -coal)?
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18
What processes are involved in diagenesis?
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19
State two diagnostic features of each of the following sedimentary rock types:
Also give an example of a common environment of deposition for each rock
type.
a) Orthoquartzite
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b) Arkose
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c) Greywacke
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d) Breccia
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e) Conglomerate
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f) Chalk
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g) Oolitic limestone
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h) Bioclastic ('Shelly') limestone
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ESTA GEOTREX The Geology Teachers Resource Exchange
Contributor: Ben Church Establishment: Monmouth Comprehensive School Date:24:05:05