In addressing the sawtoothed character of the ice-volume signal over the last 2.

Question

In addressing the sawtoothed character of the ice-volume signal over the last 2.7 Ma, and particularly the last 900 kyrs, we emphasized the role of two positive feedbacks: the ice-albedo feedback, and the CO2-ice feedback. The delayed response of the depressed crust underneath ice sheets to the removal of the ice was also implicated, as it can allow ice sheets to be vulnerable to collapse as sea level begins to rise. What is an indicator of this delayed response of the crust to ice removal?

A.increased sand-dune activity in the Sahara

B.raised beaches in formerly glaciated areas

C.fossil coral reefs now 100+ meters below sea level

D.decreased production of 14C over the last 7,000 years

Explanation / Answer

B ) Raised beaches in formerly glaciated areas .

                             The depressed crust raises from removal of ice sheets .

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