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MICHIGAN BEACHES. ventifacts. Rocks smoothed from wind erosion Angular Smooth on 1-2 sides. Formation of Dunes. Sand supply glaciers (MI) prevailing wind westerly blockade moraines (MI ). Michigan Dunes. Form on the EAST side of Of the Great Lakes. DUNE FORMATION. Pinery. - PowerPoint PPT Presentation

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MICHIGAN BEACHESventifactsRocks smoothed from wind erosionAngularSmooth on 1-2 sides

Formation of DunesSand supplyglaciers (MI)prevailing windwesterlyblockademoraines (MI)

3Michigan DunesForm on the EAST side of Of the Great Lakes

DUNE FORMATIONPinery

Ludington

Sleeping Bear

Sleeping Bear Sand DunesPerched duneOn top of a moraine

The Sleeping BearLong 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

1995 slide

Silver Lake

SILVER LAKE

Dune ErosionDue tolack of plants/treeshuman activitybad weather

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Dune erosionWhich direction will this dune move?

How to stabilize this dune?windwardleewardwind

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)

Dune sandAbrasionCreates frosted grainsangularmainly quartzhardPlentiful

Dune sand :angular pieces of

34Sagutuck, MI

Ogden Dunes. INLake MI 1986

Lake Erie House

LoessWind blown dustYellowish

WAVE EROSION

CAPE HATTERAS LIGHTHOUSE

Lake Michigan

Rip-rapLake MichiganLakeshore Drive

1 YEAR AFTER $20 MILL. BEACH NOURISHMENTUpham Beach, FL

Save my beach!http://www.as.uky.edu/academics/departments_programs/EarthEnvironmentalSciences/EarthEnvironmentalSciences/Educational%20Materials/Documents/elearning/module14swf.swf