Glacier Features Flashcards
(22 cards)
Jagged, knife-edge ridge between two cirques or glaciated valleys
Arête
Mtn pass formed by head wall erosion of cirques
Col
Steep sided pyramid produced by headward erosion of several cirques
Horn
Small lake in a cirque
Tarn
Steep slope or rock cliff at the upslope end of a glaciated valley
Head wall
U shaped glaciated valley formed by scouring action of a valley glacier
Glacial trough
Elevated above main trough
Hanging valley
Asymmetrical knoll or small hill of bedrock formed by glacial abrasion
Roche moutonnee
Parallel linear scratches and grooves in bedrock surfaces, resulting from glacial scouring
Striations
Small rounded lake or water saturated depression in glacial drift formed by melting of a detached block of ice
Kettle lake
Boulder or smaller fragment of Rock resting far from its source on bedrock of different type
Erratic
Ridge of till that forms at terminus of a glacier behind and generally parallel to terminal Lorain
Recessional morraine
Ridge of till formed from melting ice and mass wasting at the side of a valley glacier
Lateral moraine
Layers of sediment in the lake bed, deltas, or beaches of a glacial lake
Glacial lake deposits
Unstartified sheets of clayey silt and silty clay transported beyond margins of a glacier by wind and or braided streams
Loess
Sheet like layer of till left on the landscape by receding glacier
Ground morraine
Ridge of till that forms at the farthest advance
Terminal morraine
Steep sided mound of stratified dirft that formed in contact with glacial ice
Kame
Long Marie sinuous ridge of stratified drift deposited by meltwater streams flowing under the glacier
Esker
Ridge of till either in transit or deposited along the boundary between two tributary glaciers
Medial moraine
Streamlined hill commonly composed of till ideally with a steep slope facing the direction from which the ice came
Drum line
Bowl shaped depression on a high mtn slope formed by cirque glacier
Cirque
