Describe two erosional process that curve out Roche Moutonnee.
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THE TWO EROSIONAL PROCESS ARE ABRASION AND GLACIER EROSION
GLACIER EROSION
here are two main processes of glacial erosion. The first that we will talk about is plucking, which is defined as the erosion and transport of large chunks of rocks. As a glacier moves over the landscape, water melts below the glacier and seeps into cracks within the underlying bedrock. This water freezes and melts, weakening the bonds holding pieces of bedrock in place. These pieces of rock can now be picked up or plucked from their rocky base and carried along with the moving glacier. If you ever put an ice cube on your finger and felt the skin on your finger stick to the ice cube, then you have a fairly good idea of how plucking works.
ABRASION
Plucking removes rocks and by itself creates changes in the landscape, but plucking also contributes to the second process of glacial erosion, known as abrasion. Abrasion is defined as the erosion that occurs when particles scrape against each other. The enormous weight of the glacier, along with rocks and sediment plucked up and clinging to its belly scratch and carve the rock surface below. It's almost as if the moving glacier is sanding the rocks with abrasive sandpaper. As the glacier sands the rock, it leaves behind long scratches that form in the direction of the glacial movement called glacial striations. Seeing these scratch marks is a sure sign that a glacier once covered the land.
GLACIER EROSION
here are two main processes of glacial erosion. The first that we will talk about is plucking, which is defined as the erosion and transport of large chunks of rocks. As a glacier moves over the landscape, water melts below the glacier and seeps into cracks within the underlying bedrock. This water freezes and melts, weakening the bonds holding pieces of bedrock in place. These pieces of rock can now be picked up or plucked from their rocky base and carried along with the moving glacier. If you ever put an ice cube on your finger and felt the skin on your finger stick to the ice cube, then you have a fairly good idea of how plucking works.
ABRASION
Plucking removes rocks and by itself creates changes in the landscape, but plucking also contributes to the second process of glacial erosion, known as abrasion. Abrasion is defined as the erosion that occurs when particles scrape against each other. The enormous weight of the glacier, along with rocks and sediment plucked up and clinging to its belly scratch and carve the rock surface below. It's almost as if the moving glacier is sanding the rocks with abrasive sandpaper. As the glacier sands the rock, it leaves behind long scratches that form in the direction of the glacial movement called glacial striations. Seeing these scratch marks is a sure sign that a glacier once covered the land.
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