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Baraboo Quartzite - Van Hise Rock by ScottJohnson

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About This Gigapan

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Taken by
ScottJohnson ScottJohnson
Explore score
1
Size
0.82 Gigapixels
Views
565
Date added
May 12, 2013
Date taken
 
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Description

This rock, named after geologist Charles Van Hise, is a National Historic Landmark. Between two layers of quartzite - vertical here - is a layer of phyllite that has been sheared because of its sandwiched position. As the entire unit of rock folded into a large syncline, the stronger quartzite layers slid past each other - like the pages in a bending phone book. From the orientation of the foliation in the phyllite, Van Hise realized he could determine the structure of the overall fold. At the time, it was a big idea - small-scale features in an outcrop can tell you about large-scale structures that aren't as easily observed.


Gigapan Comments (1)

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  1. Ron Schott

    Ron Schott (May 12, 2013, 04:54PM )

    Sweet!

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