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.
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Abrasion on Figure 3 Glacial and periglacial landscapes diagram (numbers refer to glacial landscape case studies in the text). (In pocket). lI—Figure 1. Roche moutonnée of Cheshire Quartzite . lack sufficient diagrams and structure sections to explain fully the relationships. 1- lowever Learn about the glacial erosion processes, plucking and abrasion, and the features they create, including cirque, horns, arête and roche moutonnee.
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Glaciers generally flow over the land surface along a path of least resistance. several predictions about roche moutonnee mor-phology, which may be tested in the field. They are: 1. Lee side plucking. This is most likely to begin at a point approximately mid-way down the lee slope of a hill or spur, where ice first separates from the bed.
Roche Moutonnee 2. Crag and Tail 3. Boulder Clay or Glacial Till 4. Erratics 5. Drumlins 6. Eskers 7. Terminal Moraines 8. Outwash Plains. Glaciated
Arrow indicates the general direction of glacier flow. they are located just behind the edges of pluck- ed surfaces (Fig. 7). Roche moutonnée, (French: “fleecy rock”) English sheepback, or sheep rock, glaciated bedrock surface, usually in the form of rounded knobs.The upstream side of a roche moutonnée has been subjected to glacial scouring that has produced a gentle, polished, and striated slope; the downstream side has been subjected to glacial plucking that has resulted in a steep, irregular, and jagged slope.
15 Aug 2020 The plucking process creates a jagged end wall on the roche moutonnée called the lee. In contrast the meltwater that runs over the resistant rock
Boulder Clay or Glacial Till 4. Erratics 5.
Figure 3.3 Schematic diagram of an ice sheet and valley glacier showing the location The most common type of stoss and lee landform is a roche moutonnée. This diagram portrays the shape to an outcrop, also called a roche moutonnée. Block diagram showing the depositional setting of glacial sediments.
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later 0,3-1,2 m under markytan. Till grund för varje diagram ligga so observationer. CAROL, H., 1947: The formation of roches moutonnees. Jour.
The roche moutonnée associated with glacial rocks of the Itararé Subgroup, near Salto, central-eastern State of São Paulo, is the only example of this kind of glacial abrasion feature known in the late Paleozoic of the Paraná Basin.Though only partially preserved, the structure still displays the characteristic shape and glacial abrasion features typical of Recent and Pleistocene
2021-04-15 · Crag and tail tends to be larger than a roche moutonnée.
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'A crag and tail is a larger rock mass than a roche moutonnee. Crag and Tail features. drumlinoids, Archibald Geikie's (1887) line diagram of the key features
a rock here is a diagram: http://classconnection.s3.amazonaws.com . 6 Jul 1994 4 trai I rid ge.
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They are: 1. Lee side plucking. This is most likely to begin at a point approximately mid-way down the lee slope of a hill or spur, where ice first separates from the bed.