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Roche moutonnée

Roche moutonnée occur when glacial ice presses with great force against a rock ledge in the direction of flow. If the rock ledge can withstand the pressure of the ice, the upper side (= direction of impact) of the rock is polished and glacial polish is created. On the lower side (= leeward side) the pressure decreases rapidly, which can lead to fractures in this part of the rock.
Roche moutonnee (Rhone glacier, 2019).
Roche moutonnee (Rhone glacier, 2019).
The flow direction of the ice was from the rear right to the front left.
Roche moutonnee (Gamchi glacier, 2019).
Roche moutonnee (Gamchi glacier, 2019).
The direction of ice flow was from left to right.
Roche moutonnee (Grimsel region, 2020)
Roche moutonnee (Grimsel region, 2020)
The ice flow direction was from right to left.
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Published / Updated: 12.07.2019 / 27.07.2020

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