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Glaciers

Glacier Terms
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Erratics
Large glacial boulders that have been transported into an area.
Eskers
Long, winding ridges formed when sand and gravel fill meltwater tunnels beneath a glacier.
Firn
Partially compacted and refrozen snow which has yet to become a glacier.
Kames
Small, cone shaped hills formed at the glacial front by meltwater pouring sediment off the glaciers surface.
Kettles
Circular hollows left in an outwash plain when a buried ice block melts.
Moraine
Accumulation of glacial till.
Outwash
Sediment deposited in front of a glacier by streams of meltwater.
Outwash Plains
Broad, stratified, gently sloping deposit of sediment formed beyond the terminal moraine by streams from melting glacier.
Rock Flour
Fine sand and silt formed by the crushing of rock beneath a glacier.
Snow Line
The lowest level of permanent reaches in summer.
Striations
Scratches left on rocks and bedrock by glacier movement.
Till
Unsorted and unstratified rock materials carried in the bottom of a glacier.
Valley Glacier
A long, slow moving, wedge shaped stream of ice.
Arete
Sharp divide that separates two adjoining cirques.
Cirque
A semicircular basin formed at the head of a glacial valley.
Crevasses
Great fissures or crack in a glacier.
Drumlins
Long, canoe shaped hills made of till and shaped by an advancing glacier.
Glacial Trough
A U-shaped valley formed by glacial erosion.
Ice Caps
Small ice sheets, and was found in Iceland.
Ice Sheet
Another name for a continental glacier.
Calving
process by which a block of glacier breaks off and falls into the sea to form and iceberg.
Continental Glacier
A large sheet of ice covering a large part of a continent.
Horn
Pyramid-shaped peak formed where 3 or more cirques meet.