chapter12gh - 5/17/2011 1 Chapter 12 Coasts, Beaches, and...

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Unformatted text preview: 5/17/2011 1 Chapter 12 Coasts, Beaches, and Estuaries 12.1 Major Zones • Coastal area: land edge that borders the sea – Width varies • Geography • Climate • Vegetation • Social customs and culture • Shore: outer limit of wave action on the bottom to the limit of the waves’ direct influence on land the waves direct influence on land • Beach: accumulation of sand or gravel that occupies part of the shore CO 12 Fig. 12.1a Fig. 12.1c Fig. 12.2b 5/17/2011 2 Fig. 12.2c Fig. 12.3 12.2 Types of Coasts • Primary coasts – Effect of ice ages – Effect of sediment carried by rivers – Effect of wind – Effect of volcanic activity – Effect of tectonic activity • Secondary coasts – Erosion due to wave activity Barrier islands – Barrier islands – Coral atolls and reef coasts – Mangrove swamps and salt marshes Fig. 12.4 Fig. 12.5 Fig. 12.7 5/17/2011 3 12.2 Types of Coasts • Primary coasts – Effect of ice ages – Effect of sediment carried by rivers – Effect of wind – Effect of volcanic activity – Effect of tectonic activity...
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This note was uploaded on 07/18/2011 for the course EARTH SCIE 180 taught by Professor Frankbuonaiuto during the Spring '11 term at CUNY Hunter.

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chapter12gh - 5/17/2011 1 Chapter 12 Coasts, Beaches, and...

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