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25 terms

Unit 6 Earth Science

Mr. Luther's
STUDY
PLAY
Glacial Erosion
the process by which glaciers cut, carve or scratch the earth's surface
Alpine Glacier
a narrow, wedge-shaped mass of ice that forms in a small mountainous region
Ice Sheets
huge slabs of ice and snow that cover large areas of land for thousands of years
Continental Glacier
a glacier that spreads out from a central mass of ice
Iceberg
a large mass of ice floating at sea
Plastic Flow
A type of glacial movement that occurs within the glacier, below a depth of approximately 50 meters, in which the ice is not fractured.
Zone of Fracture
uppermost portion of glacier
Crevasse
A deep crack or fissure in the ice of a glacier.
Glacial Trough
a deep, U-shaped valley carved by an alpine glacier.
Arete
a sharp narrow ridge found in rugged mountains
Horn
glaciers curve away the sides of a mountain the result is this a sharened peak
Hanging Valley
A valley left by a melted tributary glacier that enters a larger glacial valley above its base, high up on the valley wall.
Cirque
a steep-walled semicircular basin in a mountain
Tarn
a mountain lake (especially one formed by glaciers)
Pater Noster Lakes
lakes that looked like rosary beads
Stratified Drift
glacial deposit that has been sorted and layered by the actions of streams or meltwater
Glacial Erratics
large boulders that have been plucked and transported a great distance before they are deposited
Terminal Moraine
eroded rock material dropped at the front of a glacier
Lateral Moraine
moraine that forms along the sides of glaciers
Medial Moraine
are formed when two advancing valley glaciers come together to form a single ice stream
Self Arrest
a technique that climbers use to stop from falling down a slope by digging an ice ax into the snow
Till
the mixture of sediments that a glacier deposits directly on the surface
Outwash Plain
area in front of a glacier in which melt water from the glacier has carried & deposited an abundance of sorted material
Drumlin
a mound of glacial drift
Kettle Lakes
large block of ice that falls off a glacier and melts, forming a hole then filling with water