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 (i.e. pieces cracked off) on the "lee" (downstream) side.

Dec 8, 2020 · Roches moutonnées are asymmetric bedrock bumps or hills with a gently sloping and abraded upglacier (stoss) face and a quarried (or plucked) downglacier (lee) face that is typically blunter 1,2. A good example of a roche moutonnée is shown in the image below.

A crag and tail is distinguished from a roche moutonnée by the presence of an elongate, tapered ridge of till extending downstream. Often produced by selective erosion of softer strata, roche moutonnée landscapes are characteristic of glaciated crystalline shield areas.

Jan 30, 2017 · Roches moutonnées, the rounded rock hummocks found in glaciated regions, vary somewhat in shape according to the nature of the rock, its stratification or cleavage planes and the action of the ice. Usually they have a smooth, rounded back pointing uphill, while their downhill face is rough and often steep.

Glaciers shape the land through processes of weathering, erosion, transportation and deposition, creating distinct landforms. Deposited material creates a range of interesting features such as:...

Une roche moutonnée est, en glaciologie, l'aspect que peut prendre le socle rocheux affleurant après le travail d' érosion d'un glacier, la roche présentant alors un aspect massif, convexe, d'aspect tourmenté et éventuellement strié 1, 2, 3, 4.

Jul 7, 2017 · A mountain known as the Beehive, whose steep, plucked, south-facing cliffs terrify hikers with vertigo, illustrates the accepted American definition of roche moutonnée.

Nov 29, 2008 · Roche Moutonnee are outcrops of resistant bed rock with a gentle abraded slope on what would have been the upstream side of the ice (stoss slope) and a steep rougher slope on the downstream side (lee slope).

Roches moutonnées are asymmetrical rock outcrops characterized by a gently sloping up-ice side with a polished surface (stoss), and a down-ice side with a steeply sloping plucking surface (lee). Generally, they are a few metres in length and width.

roche moutonnée (glaciated rock knob, stoss-and-lee topography) Mound-like landform of glacial erosion, consisting of a smoothed, streamlined, up-glacier surface and a broken, shattered, lee flank.