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Erosional landforms. As the glaciers expand, due to their accumulating weight of snow and ice they crush, abrade, and scour surfaces such as rocks and bedrock.The resulting erosional landforms include striations, cirques, glacial horns, arêtes, trim lines, U-shaped valleys, roches moutonnées, overdeepenings and hanging valleys.
Lower Curtis Glacier is a cirque glacier in the North Cascades in the U.S. state of Washington. Cirque glaciers are glaciers that appear in bowl-shaped valley hollows. [ 4 ] [ 12 ] Snow easily settles in the topographic structure; it is turned to ice as more snow falls and is subsequently compressed. [ 12 ]
A kame delta (or ice-contact delta, morainic delta [1]) is a glacial landform formed by a stream of melt water flowing through or around a glacier and depositing material, known as kame (stratified sequence of sediments) deposits. Upon entering a proglacial lake at the end (terminus) of a glacier, the river/stream deposit these sediments. This ...
Glacial landform – Landform created by the action of glaciers; ... Diagram illustrating (i) tunnel in glacier before retreat of ice, forming (ii) ...
A kame, or knob, is a glacial landform, an irregularly shaped hill or mound composed of sand, gravel and till that accumulates in a depression on a retreating glacier, and is then deposited on the land surface with further melting of the glacier.
Diagram of glacial plucking and abrasion. Glaciers erode terrain through two principal processes: plucking and abrasion. [64] As glaciers flow over bedrock, they soften and lift blocks of rock into the ice. This process, called plucking, is caused by subglacial water that penetrates fractures in the bedrock and subsequently freezes and expands ...
Glacial landform – Landform created by the action of glaciers; Drumlin – Elongated hill formed by glacial action; Esker – Long, winding ridge of stratified sand and gravel associated with former glaciers; Moraine-dammed lake – Type of lake formed by glaciation; Terminal moraine – Type of moraine that forms at the terminal of a glacier
Cross section of a cirque glacier showing the bergschrund A bergschrund—the long crack at the foot of the mountain slope—in the Ötztal Alps Open bergschrunds at Mont Dolent. A bergschrund (from the German for mountain cleft) is a crevasse that forms where moving glacier ice separates from the stagnant ice or firn above. [1]