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ES Chapter 15 Leach

ES Chapter 15 Terms Coach Leach Glaciers

QuestionAnswer
arête sharp, jagged ridge formed between cirques
basal slip movement of a glacier caused by the melting of ice in contact with the ground
cirque bowl-shaped depression produced by a valley glacier
continental ice sheet mass of ice that covers large land areas
crevasse large crack that forms on the surface of a glacier
drumlin long, low, tear-shaped mound of till
erratic large boulder transported and deposited by a glacier
esker long, winding ridge of gravel and coarse sand deposited by a glacier
firn grainy ice in a glacier that gas been partially melted and refrozen
glacial drift sediments deposited by a glacier
glacier mass of moving ice
ground moraine unsorted material left beneath a glacier when the ice melts
hanging valley small abandoned glacial valley suspended on a mountain above the main glacial valley
horn sharp pyramid-like peak formed where several aretes join
ice age long period of climatic cooking during which ice sheets cover large areas of the earth's surface
internal plastic flow slow movement of a glacier in which ice crystals slip over each other
kettle depression in a glacial outwash plain
lateral moraine unsorted material deposited along the sides of a valley glacier
medial moraine ridge of unsorted glacial material along the center of a valley glacier
meltwater melted ice flowing from a glacier
Milankovitch theory theory that small, regular changes in the earth's orbit and in the tilt of the earth's axis caused the ice ages
outwash plain deposit of stratified drift
roche moutonnee rounded knob of rock produced by glacial erosion
snowfield almost motionless mass of permanent snow and ice
stratified drift glacial deposit that has been sorted and layered by the action of streams or meltwater
terminal moraine till deposited at the leading edge of a melting glacier
till unsorted rock material deposited by a glacier
valley glacier long, narrow, wedge-shaped mass of ice that usually moves through a mountain valley
Created by: CoachLeach
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