Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Help ID'ing cause of terrain feature:

  1. Sep 14, 2006 #1
    http://www.mcschell.com/crack.jpg [Broken]
    This image is from a hiking trip I took a few years back. The image is of a mountain on the Maine/New Hampshire border (West Royce Mtn.). The mountain has a large vertical fracture running almost the whole length of the steep northeast face of the mountain. Through binoculars the fracture appears quite deep.

    To the left and right of the fracture you can see evidence of what looks like exfoliation. Would the fracture also be the result of expansion after uplift, or some other cause?

    Full image is here:
    http://www.mcschell.com/wroyce.jpg [Broken]

    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Sep 14, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    http://www.coloradocollege.edu/Dept/GY/faculty/wphillips/web%20page.htm [Broken]

    Looks like you've got your choice of residual stress in a fold, residual stress from geopressure following erosion, faulting, slump into incompetent bed, or someone with a really big rock saw.
    Last edited by a moderator: May 2, 2017
  4. Sep 17, 2006 #3


    User Avatar
    Science Advisor

    Based on the sarounding topography in the larger photo, I would say slumping is the most likely. Looks like the end of the larger structrue is breaking off into the adjacent valley.
  5. Oct 2, 2006 #4
    That was definitely caused by Paul Bunyan sticking his ax in the ground.
    Last edited by a moderator: May 2, 2017
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook