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Shorelines - Rip current Depositional shoreline Erosional...

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Chapter 20 Shorelines Shoreline – line that marks the contact between land and ocean. Tides – daily rise and fall of water level due to attraction of the earth’s water to the moon and sun. Moon is the primary influence on tides, sun is secondary. Spring tide Neap tide Typical tidal range is about 0.5 to 1 meter (from high tide to low tide). This fluctuates during the lunar cycle. New moon 1 st Quarter Full moon Last quarter Wave – circular movement of water due to wind. Surface-driven phenomenon, so it dies out as you go down into the water. Wave base Breaker or Breaking wave Current – moves water from one place to another. Swash Backwash Longshore current
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Unformatted text preview: Rip current Depositional shoreline Erosional shoreline Erosional features Headland Sea cave Sea arch Sea stack Wave-cut cliff Wave-cut platform Depositional features Beach [Sand] spit Recurved spit Baymouth bar Tombolo Barrier island There is usually a balance between erosion and deposition, resulting in no net erosion or deposition over the course of a single year. That can change due to storms or human intervention. Preventing/Minimizing Erosion Jetty – often used to protect ship channels Groin – same shape/size/orientation as a jetty, but not for channel protection. Breakwater Sea wall Rip rap...
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