Which Statement Comes Closest to Describing the Isostatic Compensation Under

question 89

Multiple Choice

Which statement comes closest to describing the isostatic compensation under convergent continental mountain belts?

• A)The extra elevation of mountains, like that of icebergs above the sea, is held up by the weight of the denser material that their lower portions displace.
• B)The extra elevation of mountains is maintained almost entirely by rising mantle plumes.
• C)The extra elevation of mountains is accounted for by the missing mass from adjacent eroded valleys and flanking lowland areas.
• D)The extra elevation of mountains is maintained by active elastic compression supplied by earthquake cycles and crustal convergence.

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