Which numbered feature(s)on this photograph are consistent with the presence of glaciers sometime in the past?

Question

Quizplus · Accepted Answer

All of the features listed (arête, U-shaped valley, tarn) are consistent with the presence of glaciers in the past. Arêtes are jagged ridges that form when glaciers erode both sides of a mountain ridge. U-shaped valleys are carved out by glaciers as they move through a V-shaped valley, widening and deepening it. Tarns are small, often circular, lakes that form in depressions left behind by glaciers. Therefore, all three features suggest that the area was once shaped by glacial activity.

Which Numbered Feature(s)on This Photograph Are Consistent with the Presence