Which type of structure is formed as glaciers scoop out rocks leaving hollow basins at their high end at the top of a valley?

A. eskers

B. terminal moraines

C. glacial striations

D. cirques

The answer is cirques. The type of structure that is formed as glaciers scoop out rocks leaving hollow basins at their high end at the top of a valley is cirques. It is an amphitheater-shaped basin with precipitous walls, at the head of a glacial valley. It generally results from erosion beneath the bergschrund of a glacier.