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Alpine Glacier Reconstruction

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Submitted By mjdlht
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UNIVERSITY OF SOUTH ALABAMA

Last Time
Glaciers and Glacial Mechanics
• • Types of glaciers (alpine) Formation of glacial ice • Movement of ice

GY 301: Geomorphology
Lecture 22: Glacial Geomorphology 1: Alpine Glaciers http://www.roberts-1.com/t/s07 Glaciers
Glaciers are thick masses of ice that originate on land through the accumulation of snow.

Glaciers
Glaciers are thick masses of ice that originate on land through the accumulation of snow. Glaciers form through a 3 step process Snow Firn Glacial Ice

All that is required is for more snow to fall in the cold winter months than melts in the warm summer months. http://media-cdn.tripadvisor.com/media/photo-s/01/25/4a/ee/in-the-mountains-above.jpg http://www.ig.utexas.edu

Alpine Glaciers
Alpine or Valley Glaciers
(Zone of Accumulation; Zone of Wasting/Ablation, Calving,)

Ice Movement
Ice moves down slope from the zone of accumulation to the zone of ablation due to a combination of plastic flow and basal slip.

http://www.scienceclarified.com/images/uesc_05_img0282.jpg

http://stloe.most.go.th/html/lo_index/LOcanada3/305/images/5_2.jpg

http://nevis.k12.mn.us/academics/science/glacier_hor_profile1.jpg

1

Ice Movement
Ice moves down slope from the zone of accumulation to the zone of ablation due to a combination of plastic flow and basal slip.
Slip

Geological Effects of Glaciers
Ice exerts tremendous erosive force on bedrock forming unique geomorphologic features and transporting great quantities of sediment …. … to be continued http://www.kschapterc.org/album-mead/23.jpg Firn 50 m

Flow

Today’s Lecture
Glacial Geomorphology (alpine variety)
• • Erosive features Depositional features

Alpine Glaciers and Erosion
When alpine glaciers form and advance, significant changes to the terrain will occur
Before Glaciation

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