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Erosion and Deposit
Mass Movement & Glaciers
| Term | Definition |
|---|---|
| Erosion | process by which natural forces move weather rock and soil (sediment), from one place to another. |
| Forces that cause erosion | gravity, moving water, glaciers, waves and wind |
| Forces that effect rate of erosion | weather, climate, topography and type of rock |
| Deposition | the laying down or settling of eroded material. |
| Give an example of Deposition | sediment deposited at the mouth of a river causing a delta. |
| Give an example of Erosion | Wind moving sand to form a dune. |
| Mass Wasting | downhill movement of a large mass of rocks or soil because of the pull of gravity. |
| Give an example of Mass Wasting | land or mud slides, slump or creep. |
| Glacier | large mass of ice that formed on land moves slowly across Earth’s surface. They form in areas where the amount of snowfall is greater than the a mount of snow melt. |
| Continental Glacier (Ice Sheets) | covers large areas of land and move outward from central location. It exists today in Antarctica and Greenland. |
| Valley Glacier (Alpine) | long, narrow glacier that forms when snow and ice buildup high in a mountain VALLEY. |
| What are two processes by which Glaciers erode the land | Plucking & Abrasions |
| Plucking | as a glacier flows over the land, it picks up rocks and large boulders, dragging them across the land. |
| Abrasions | caused by plucking; gouges and scratches at the bed rock |
| What are 3 types of landforms created from a melting Glacier? | till, moraine, kettle |
| Till | mixture of sediment that is deposited directly on the surface. |
| Moraine | mound or ridge formed from till deposited at the edge of glaciers. |
| Kettle | small depression that forms when a chunk of ice is left in till then eventually melts. |
| Arete | sharp ridge separating two cirques |
| Cirque | bowl-shaped hollow eroded by a glacier. |
| Fiord | valley created by glacier now filled with sea water |
| Drumin | long mound of till, or glacier deposits, smoothed in direction of glacial flow. |
| Horn | a sharpened peak formed from glaciers descending from top of mountain |
| U-Shaped Valley | a glacial trough formed by glacier scooping out the land |
| Kettle Lake | small depression left in till formed by melting ice |
| Glacial Lake | large hole that was eroded by a glacier then filled in with water when glacier melted. |
| Hanging Valley | small glacier at high elevation approaches a large glacial valley; sometimes forming a waterfall. |
Created by:
HERBlackburn
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