slgwv

slgwv club

Posted: 22 Sep 2015


Taken: 02 Sep 2015

9 favorites     8 comments    782 visits

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USA
Utah
erosion
failure
collapse
National Park
Zion
Great Arch
Navajo Sandstone


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The Great Arch

The Great Arch
The name was not drawn from a hat! ;) Zion National Park, Utah, USA; pic taken from an overlook on the way to the Zion Tunnel on Utah State Route 9. These collapse arches are a common failure mode in the massive Navajo Sandstone as it's undermined by erosion. There is a trail to an overlook at the low point to the right of the arch. The trailhead is right by the eastern portal of the tunnel.

, Gudrun, , tiabunna and 5 other people have particularly liked this photo


8 comments - The latest ones
 William Sutherland
William Sutherland club
Awesome capture!

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8 years ago.
 Pam J
Pam J club
Amazing !
8 years ago.
 tiabunna
tiabunna club
Fascinating, it almost looks to be sculpted.
8 years ago.
 slgwv
slgwv club
Thanks, everyone! It's a spectacular feature--and yes, it's natural ;) Btw, this sort of "undermining" erosion is called "sapping," by analogy with the military operation.
8 years ago. Edited 8 years ago.
 slgwv
slgwv club
Thanks, Mitch!
8 years ago.
 Gudrun
Gudrun club
Spectacular, it really couldn't have any other name! I've seen a similar (mudstone) arch on the Whanganui river in NZ but it was much smaller.;-)
8 years ago.
 slgwv
slgwv club
It's a textbook example!
8 years ago.
 slgwv
slgwv club
Thanks, Marvin!
6 years ago.

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