In the interior of continents the earth's crust is typically about 40 km thick and the elevation is near sea level. In the Himalayas the crust is more than 60km thick
Isostasy says crust thicker than this average should produce elevated terrain (mountains), so why isn't the elevation of the Himalayas 20km?
In isostasy the mass of the entire column is balanced, not the just the part that is uplifted, with mountain "roots" compensating the uplift. The analogy of different thickness of blocks of wood floating water is an excellent analogy to use here, so the actual elevation may be several km compensated by a root beneath the mountains.
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A. metamorphic mineral deposits. B. sedimentary mineral deposits. C. igneous mineral deposits. D. None of the choices are correct.
What region of the United States is best suited for producing wind used for energy?
A) Southwest B) Northeast C) Southeast Mountains D) Northwest E) Western Mountains
As a tsunami enters shallow water, ____
a. ?the wave speed will increase, and the height will increase b. ?the wave speed will increase, and the height will decrease c. ?the wave speed will decrease, and the height will decrease d. ?the wave speed will decrease, and the height will increase e. ?the wave speed remains the same as the height increases
Subtropical waters are typically more saline than equatorial waters because of
A. high evaporation, low precipitation. B. low evaporation, low precipitation. C. high evaporation, high precipitation. D. low evaporation, high precipitation.