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Roberts Rift, Canyonlands, Utah, A Natural Hydraulic Fracture Caused by Comet or Asteroid Impact |
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| Authors: | Peter W Huntoon Eugene M Shoemaker |
| Institution: | Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071.;U.S. Geological Survey, Flagstaff, Arizona 86001. |
| Abstract: | |
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