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“Geology on the Wing” Wednesdays #2 – Grand Tetons, Wyoming

August 3, 2011

#2 in the weekly series is a ‘shingled’ image of the Grand Tetons that I thought was too good to use only once.  This image is taken looking almost due east from 17,000 feet – Grand Teton (tallest of the three in the middle) stands nearly 14,000 feet.  Notice that even in early July, there is still a lot of snow cover – this is due to the unusually snowy winter, and as a result all of the rivers are now raging with summer melt.

The rocks making up the Tetons range are quite diverse in terms of composition, age, and environment of deposition.  The uplift of the range was caused by the Laramide orogeny and attendant volcanic activity.  The modern topography of the Tetons is so striking due to Pleistocene glaciation under the Canadian ice sheet.  By the way, there is a great national park there as well…

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2 Comments leave one →
  1. hollis permalink
    August 21, 2011 15:38

    Great photos, I like your blog. The way I understand it, there was uplift in the Teton area during the Laramie orogeny, but today’s Teton Range is the product of more recent activity … ca 10 mya … a relatively young mountain range.

    • August 23, 2011 13:31

      That may indeed be correct. I am no expert in the tectonics of the area, but you have a good point – certainly a mountain range that rugged and high must be fairly young, younger than the Laramide. Looks like we need an expert to weigh in…

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