How Are Crag and Tails Formed?

Depositional crag-and-tails were formed by the inflow of glacial sediments into a cavity produced in the lee of the rock obstruction, and hence have tails composed of unconsolidated sediments. These tend to be smaller in scale.

How are Roche Moutonnee formed?

In glaciology, a roche moutonnée (or sheepback) is a rock formation created by the passing of a glacier. The passage of glacial ice over underlying bedrock often results in asymmetric erosional forms as a result of abrasion on the "stoss" (upstream) side of the rock and plucking on the "lee" (downstream) side.

What is the steep side of the crag and tail called?

Crag and tail - outcrop of resistant rock with a steep-sided stoss end, created by plucking and a gentle, sloping lee side. This gentle slope is created by the deposition of moraine.