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The Athabasca Sand Dunes

The Athabasca Sand Dunes
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The Athabasca Sand Dunes were formed about 8,000 to 9,000 years ago at the end of the last glacial period. As the ice sheet melted, meltwater washed enormous quantities of sand, silt and sediment from local sandstone into Lake Athabasca, whose water level was much higher then than it currently is. Then the lake receded, exposing the large sand deposits on the shores.

Above Photo credit: Hidehiro Otake 
The Athabasca Sand Dunes athabasca-sand-dunes-1
Lake Athabasca, Canada. In this false-color image, the ice is light blue, dark blue is open water and the sand dunes are white.
The Athabasca Sand Dunes athabasca-sand-dunes-2
Photo credit: Tim Beckett/Flickr
The Athabasca Sand Dunes

The Athabasca Sand Dunes

Via(amusingplanet)
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