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Published byBrett French Modified over 8 years ago
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MICHIGAN BEACHES
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ventifacts Rocks smoothed from wind erosion Angular Smooth on 1-2 sides
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Formation of Dunes Sand supply –glaciers (MI) prevailing wind –westerly blockade –moraines (MI)
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Michigan Dunes Form on the EAST side of Of the Great Lakes
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DUNE FORMATION
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Pinery
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Ludington
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Sleeping Bear
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Sleeping Bear Sand Dunes Perched dune On top of a moraine
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The Sleeping Bear
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Long ago, in the land that is today Wisconsin, Mother Bear and her two cubs were driven into Lake Michigan by a raging forest fire. The cubs swam strongly but the distance and the water proved too much for them. They fell further and further behind and ultimately slipped beneath the waves. When Mother Bear reached the Michigan shore, she climbed to the top of a bluff and peered back across the water, searching vainly for her cubs. The Great Spirit saw her and took pity on her plight. He raised North and South Manitou Islands to mark the place where her cubs vanished and laid a slumber upon Mother Bear. -Ojibway Indian Legend
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1995 slide
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Silver Lake
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SILVER LAKE
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Dune Erosion Due to –lack of plants/trees –human activity –bad weather
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Dune erosion Which direction will this dune move? How to stabilize this dune? windward leeward wind
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You can help protect the dunes by: staying on paths, not littering, by leaving plants and wildlife in place
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BARCHAN DUNES (overhead view)
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Dune sand Abrasion –Creates “frosted grains” –angular mainly quartz –hard –Plentiful
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Dune sand : angular pieces of…
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Sagutuck, MI
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Ogden Dunes. IN Lake MI 1986
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Lake Erie House
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Loess Wind blown dust Yellowish
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WAVE EROSION
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CAPE HATTERAS LIGHTHOUSE
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Lake Michigan
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Rip-rap
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Lake Michigan Lakeshore Drive
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1 YEAR AFTER $20 MILL. BEACH NOURISHMENT Upham Beach, FL
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Save my beach! http://www.as.uky.edu/academics/departme nts_programs/EarthEnvironmentalSciences/ EarthEnvironmentalSciences/Educational% 20Materials/Documents/elearning/module1 4swf.swfhttp://www.as.uky.edu/academics/departme nts_programs/EarthEnvironmentalSciences/ EarthEnvironmentalSciences/Educational% 20Materials/Documents/elearning/module1 4swf.swf
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