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You are browsing the archive for 2011 July 05.

5 July 2011

Varves from Yellowstone Lake

The other day, driving south through Yellowstone on our way to the Tetons, I stopped to give my students the obligatory look over Yellowstone Lake’s West Thumb, looking east towards the snowcapped Absaroka Range in the distance. But in addition to a lovely view and a few birds, we found something really cool… Those are varves, seasonally-laminated couplets of sediment (light = summer; dark = winter) that are made of …

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