12-3-08 - Geography 1111 12/3/08 Coastal Landforms 1....

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Geography 1111 12/3/08 Coastal Landforms 1. Near-shore Topography a. Continental shelf b. Coral reefs 2. Energy inputs along coasts a. Tides b. Waves c. Longshore current 3. Erosional and depositional coastlines Near-shore Topography Continental shelf- submerged shallow surface that gradually slopes away from coastline o Part of continental crust, not ocean basin Coral reefs—combination of reef-building algae and coral (an animal), built up on pieces of old, dead reef o Common in tropical environments. o Scattered across the tropics o 3 types- fringing, barrier, atoll. Volcano erodes away as it begins it is fringing, then as it continues to erode it is a barrier then when it’s gone it is an atoll. Material Inputs Along Coasts Streams deliver sediments to coast o Silts/clays carried offshore o Sands deposited along coastline=beach Wind builds dunes behind beach o Held in place by sparse vegetation cover
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o Easily eroded and transported by storms Energy Inputs Along Coasts
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This note was uploaded on 01/17/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at University of Georgia Athens.

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12-3-08 - Geography 1111 12/3/08 Coastal Landforms 1....

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