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I forget where this was...  Alaska, May 07.
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chris tregge
Sep 16, 2008
I forget where this was... Alaska, May 07.  
in fact this lake is not in Ak but in Yukon, this Emerald Lake.The color derives from light reflecting off white deposits of marl, a mixture of clay and calcium carbonate, at the bottom of the shallow waters.

The high concentration of calcium carbonate in the water here comes from limestone gravels eroded from the nearby mountains and deposited here 14,000 years ago by the glaciers of the last ice age. Glacial erosion was likewise responsible for scooping out the shallow lakebed. Jun 10, 2014
chris tregge
chris tregge   Beersconsin  
Yeah that makes sense, Professor. We were in the Yukon as well. Cool explanation! Jun 9, 2015
This is Emerald Lake, on the Klondike Highway just North of Carcross, British Columbia; when you are driving from Skagway (northernmost part of SE Alaska) to Whitehorse (capital of the Yukon Territory). I live here :)) Oct 26, 2016

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