Campi Flegrei, home to two million people, is a(n) ____
a. ?extinct lava dome
b. ?active stratovolcano
c. ?extinct resurgent caldera
d. ?active resurgent caldera
e. ?active shield volcano
ANSWER: d
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Large petroleum deposits in the Gulf Coast and Persian Gulf were the result of deposition in the
a. Paleozoic. c. Cenozoic. b. Mesozoic. d. Precambrian
The amount of underthrusting between Asia and India
a. is less than 200 kilometers. b. is more than 2000 kilometers. c. is more than 20,000 kilometers. d. is more than 50,000 kilometers. e. cannot be estimated with any accuracy.
What is the best example of a major human impact on mountain ecosystems?
A. conversion to cropland B. overgrazing by livestock C. depletion of groundwater D. timber cutting E. habitat loss due to the development of major urban areas
Imagine two magmas that are identical in all respects (for example, same chemistry, pressure, volume) except that one magma is hotter than the other. Which magma will have the higher viscosity?
A. The cooler magma will be more viscous. B. The hotter magma will be more viscous. C. The magmas will have the same viscosity. D. There is not sufficient information to establish the relative viscosities of these magmas. E. Temperature does not affect magma viscosity.