Which feature forms a ridge between two cirque valleys?

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Study for the ASBOG Fundamentals of Geology exam. Access flashcards, multiple-choice questions, and understand key geologic principles. Prepare confidently for your exam!

Multiple Choice

Which feature forms a ridge between two cirque valleys?

Explanation:
In alpine glaciation, cirques carve bowl-shaped hollows on opposite sides of a peak. When two cirques form next to each other, the rock between them remains as a narrow, sharp crest—the ridge that separates the two glacial valleys. That crest is an arête. It often has a knife-edge profile after the ice retreats. The other features describe different glacial deposits or forms: talus is fallen rocky debris at a cliff base, moraine is till deposited at the glacier’s edge or terminus, and an esker is a sinuous ridge formed by meltwater flowing beneath or within a glacier.

In alpine glaciation, cirques carve bowl-shaped hollows on opposite sides of a peak. When two cirques form next to each other, the rock between them remains as a narrow, sharp crest—the ridge that separates the two glacial valleys. That crest is an arête. It often has a knife-edge profile after the ice retreats. The other features describe different glacial deposits or forms: talus is fallen rocky debris at a cliff base, moraine is till deposited at the glacier’s edge or terminus, and an esker is a sinuous ridge formed by meltwater flowing beneath or within a glacier.

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