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Rock Climbing Photo: I forget where this was...  Alaska, May 07.
Id# 106255629, 778 x 583px View full size
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By TobinPetty
From: Nampa, ID
Sep 16, 2008
By Sean Wolf
From: Denver, CO
Aug 14, 2009
That water is incredible!
By Andrew James C
From: Portland, OR
Oct 10, 2009
is that a lake or ocean water?
By Chris treggE
From: Madison, WI
Oct 29, 2009
It's a lake, inland Alaska. Not sure what type of mineral makes it so blue, but the water really was that color. Bizarre and very cool to see.
By David Hertel
From: Anchorage
Apr 20, 2010
By B-Mkll
From: Bozeman, MT
Jun 9, 2014
Katmai NP
By Claudio
Jun 10, 2014
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.
By Chris treggE
From: Madison, WI
Jun 9, 2015
Yeah that makes sense, Professor. We were in the Yukon as well. Cool explanation!
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I forget where this was... Alaska, May 07.

Submitted By: Chris treggE on Sep 16, 2008
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