Scratch Circles (Scharrkreise)
Created when winds cause a bent stalk of dune grass to pivot on its axis
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Scratch Circle photo taken on Dec 25, 2015 on the shores of Lake Michigan
Image credit: David Marvin
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Some Remarks on the Formation of Scratch Circles on Wind-Blown Sand
Interesting short article on scratch circle formation. -
Scratch Circles - EPOD
Earth Science Picture of the Day site
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