A large intrusion of magma that forms over a long period of time deep under the Earth has 128 square kilometers exposed to the surface by erosion. Analysis proves that the rock contains large crystals of gabbro. This formation is called
A) a stock.
B) a batholith.
C) a dike.
D) a sill.
Answer: B
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This joint project between Brazil and Paraguay generates 20% of the power consumed in the former, and over 75% in the latter.
A. Porto Alegre Nuclear Power Facility B. Parazil Dam C. Three Gorges Dam D. Itaipu Dam
What type of oil trap is formed primarily by depositional processes rather than by deformation?
a. salt dome b. stratigraphic c. volcanogenic d. fault e. anticline
Excess pumping of fresh water wells in coastal areas may do all of the following except
A) increase the quality of the water. B) create a deeper cone of depression. C) draw salt water from the lower aquifer up. D) draw water that is undrinkable.
What is NOT a valid option to help solve the mineral supply problem in the world?
A) using chemical processes to fabricate minerals from common substances B) extracting minerals from the ocean (this would require cheap electricity) C) reducing waste in the extraction and processing of minerals D) encouraging lower per capita levels of resource use E) reusing minerals (recycling)