Ocean101-Ch11-Part2

Ocean101-Ch11-Part2 - 1 3 3 Depositional Depositional...

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Unformatted text preview: 1 3. 3. Depositional Depositional Coasts Coasts Longshore Drift Longshore Drift The transport of sediment (e.g., sand) parallel to the shoreline, mainly in the surf and swash zone. Longshore drift is the main way sediments move along coasts. See Fig. 11.14, p. 255 Swash up, Backwash down Fig. 11.16, p. 257 Large-Scale Features of Depositional Coasts 2 How a spit forms Cape Cod, Martha’s Vineyard, & Nantucket (Mass.) Glacial moraine sediments, reworked by ocean waves A single section of coast with river input, longshore drift, and eventual output down a submarine canyon. Sediment inputs and sediment outputs are balanced. Coastal Cells See Fig. 11.15, p. 256 Coastal Region 3 Lower part of beach exposed at low tide Tidal Fuctuations alternately expose and submerge tidal Fats which almost surround Mont-Saint-Michel, ¡rance Tidal fats Tidal fats Beaches • Sediments are composed of locally available materials. • The sizes of particles vary widely between beaches. • Particle size largely determines the slope of the beach....
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This note was uploaded on 01/09/2012 for the course OCEA 101 taught by Professor Gwynethjones during the Winter '12 term at Bellevue College.

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Ocean101-Ch11-Part2 - 1 3 3 Depositional Depositional...

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