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105-23 10-17 Coastlines, beaches

105-23 10-17 Coastlines, beaches - Chapter 20 Figure Opener...

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GEOL 105L G. DAVIS 10/17/2011
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Sandy beach, Brazil
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Sea cliffs, Malta
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Coastlines differ greatly — in large part due to tectonics
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active plate boundary coastlines passive non-plate boundary coastlines
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Coastlines differ greatly — in large part due to tectonics The Big Sur coast, Calif.
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Coastlines differ greatly — in large part due to tectonics Jones beach N.Y. The Wildwoods N.J. Cape Hatteras N.C.
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Regardless of the type of coast or shoreline, the interface between land and sea (or, land and large lakes) is a highly dynamic environment capable of great change — both suddenly and over long periods of time …
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Hurricane storm surge, SE US
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Shorelines can change overnight! Cameron, Louisiana before and after Rita (2005)
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Ventura beach, 10/97 Same beach, 4/98 and major changes can occur during a single storm season — examples from Ventura County beaches
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UCSB 1975 Changing shorelines create challenges for coastal engineers … As seen in these pictures of the evolving UCSB coast over 30 yrs dog
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UCSB 1975 Changing shorelines create challenges for coastal engineers … As seen in these pictures of the evolving UCSB coast over 30 yrs dog gone!
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1983 beach gone!
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10/2004 beach back
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1/2006
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Figure 20.3 Surf — what’s it all about?
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