What is the Law of Superposition?
A. Sedimentary layers become progressively younger with depth
B. Sedimentary features are always superimposed on other types of rocks
C. Sedimentary layers become progressively older with depth
D. Sedimentary rocks are always deposited in horizontal layers
Answer: C
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What are some effects of building a dam?
A) A stream has more sediment below the dam and so can erode more efficiently. B) The reservoir (lake) traps sediment that over time fills up part of the reservoir. C) A dam, whether constructed by nature or by humans, represents a permanent change in base level. D) The stream erodes into the land instead of depositing sediment, where it enters the reservoir.
Savannas might be created by human-caused fires
Indicate whether the statement is true or false.
The critical circle in a stability analysis would be the circle with the:
a. highest resisting moments b. highest driving moments c. highest safety factor d. lowest safety factor
Faults that have dip-slip displacement and result from tensional forces are called:
a. reverse faults. b. normal faults. c. strike-slip faults. d. joints. e. thrust faults.