2.6 Sedimentary Rocks

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Sedimentary Rocks
Geo 12
1. Indicate the correct response for the following multiple choice questions
A. Sediments are classified as either clastic or chemical based on:
a) the size of the sediments,
b) the composition of the sediments
c) the source of the sediments
d) the degree of compaction of the sediments.
B. Clastic sedimentary rocks are named primarily on the basis of:
a) chemical composition
b) degree of cementation
c) particle or sediment size
d) presence or absence of quartz
C. Chemical sedimentary rocks are named primarily on the basis of:
a) chemical composition
b) degree of cementation
c) particle or sediment size
d) presence or absence of quartz
D. Sediment is transported most commonly and effectively by:
a) glaciers
b) wind
c) running water (streams, etc.)
d) ocean waves
E. The most abundant type of sedimentary rock is:
a) limestone
b) conglomerate
c) shale
d) sandstone
2. From the samples of sedimentary rocks provided:
For each sample:
i) give the rock name, us your sedimentary rock identification sheet
ii) classify the sample as clastic or chemical
iii) describe the texture (size of the particles or crystals)
iv) draw a sketch of the rock
Name______________
3. Using a ruler to measure the diameter of each drawing and then use the sediment table provided to
determine type of sediment; boulder, cobble, pebble,
sand, silt, clay.
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