Why is calcite such a common sedimentary cementing material?
A) Calcite precipitates and forms cement readily at depth due to elevated temperatures.
B) Calcite is very common.
C) Calcite dissolves in water faster than halite does.
D) Calcite is the most abundant material in the earth's crust.
Answer: A
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A. Agriculture B. Drinking C. Watering livestock D. Industrial activities E. Dumping into freshwater systems
Conifers are examples of angiosperms. Indicate whether the statement is true or false
What do you notice concerning the percentage of permanent gasses throughout the atmosphere (all levels)? [INSERT TABLE 1-2. WITH CAPTION]
A) It varies significantly from the surface up. B) It varies significantly only at the tropopause. C) It is the same throughout the atmosphere from the surface up. D) It varies only in the mesosphere.
The application of the precautionary principle to a commercial fishery whose primary catch species is in decline would result in
A) many years in which no fish are harvested at all. B) an optimal population size that is just about the maximum sustainable yield. C) a total allowable catch above the best estimate of the maximum sustainable yield. D) a total allowable catch below the best estimate of the maximum sustainable yield.