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rock walls used to protect harbor from sand deposition/storm waves |
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protect beaches that are losing sand from longshore drift |
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absorbs the force of large, breaking waves and provide quiet water nearshore |
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consequences of breakwaters/jetties |
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Definition
- breakwaters=allowed sand to build-up behind the breakwater and it threatened to fill in the anchorage
- jetty=build two, and sand builds up against one jetty, and the beach next to it has barely any sand
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wave slows down, and changes direction or bends the waves |
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water pushes both up the beach, toward land and along the beach parallel to the shore |
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a broad gentle sloping platform that may be exposed at low tide, if the shore has a lot of tidal action |
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erodes sand from the sea bottom and keeps them suspended.....and creates
- spits
- baymouth bars
- tombolos
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fingerlike ridge of sediment that extends out into open water |
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ridge of sediment that cuts a bay off from the ocean, and is formed by sediment migrating across what was earlier an open bay |
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bar of sediment connecting a former island to the mainland |
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ridges of sand that parallel the shoreline and extend above sea level, formed from sand eroded by waves from deeper water offshore, or they may be elongated sand spits formed by longshore drift |
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are erosional remnants of headlands left behind as the coast retreats inland. Rocky islands off retreating coasts |
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are bridges of rock left above openings eroded in headlands or stacks by waves. It is eroded in spots where the rock is weaker than normal, or with fractures |
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