Porosity of rocks typically remains stable. In other words, it does not vary considerably over short distances.
a. true
b. false
Ans: b. false
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Which of the following is a good interpretation of the environmental significance of an attribute of a sedimentary rock?
a fossils indicate that a sediment was deposited on land b) large cross beds in a well stored sandstone usually indicate deposition by wind c) mudcracks are formed in deep water environments where sand and mud can be deposited in thin layers d) large, angular, poorly sorted clasts reflect a large amount of transportation e) none of the above
Which is a characteristic of thermoclines?
a. Tropical thermoclines are shallower than those at higher latitudes. b. Thermoclines tend to be identical in form. c. Polar waters tend to lack thermoclines. d. Thermoclines are more pronounced in the high latitudes. e. Thermoclines are not affected by seasons.
What country in the region is a cautionary tale about the limits of the ability of a valuable natural resource, such as oil, to promote development?
A) Angola B) Sudan C) Nigeria D) South Africa E) Namibia
Stream terraces along the sides of river valleys are usually evidence of ____
a. mass wasting b. trellis drainage c. distributary channels d. major changes in base level