| A roche moutonée is a protrusion of the underlying bedrock that has been abraded smooth on the up-flow side, and plucked on the down-flow side. The roche moutonée in this picture (from the head of the Green River, Wind River Range, Wyoming), in the middle foreground, shows that the glacier flowed from left to right. The process by which these features form is controlled by ice flow and bedrock type. A roche moutonee is an erosional form which is an end member of a continuum of streamlined forms including crag-and-tail (deposition behind a resistent knob) and drumlins (erosion and deposition of till). |
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