GEOG 1350 Lecture Notes - Lecture 9: British Columbia Coast, Coastal Erosion, Continental Shelf
30 Nov 2017
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Document Summary
The landscapes where continents meet oceans are dynamic and capable of rapid change. Major hazards include rip currents, erosion, sea level rise, storm surges, and tsunamis. Some coastline margins are in uenced by plate tectonics. Passive margins are distant from plate boundaries (east coast) Active margins are relatively close to plate boundaries (west coast) Passive margins have wide continental shelves, sandy or pebbly beaches, and barrier islands. Continental shelves can extend for a couple hundred meters in the shallow part of the ocean. Ex: east coast of north america, canadian artic. Active margins have more rocky shorelines and sea cliffs. Coastal topography is in uenced by the type of rock as we; as the sediment deposited from rivers or glaciers. Wind blowing over an ocean or a lake transfers energy to the water, producing waves. Waves travel through the water and expend their energy at the shoreline. Fetch (the distance wind blows across the water)
