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kpinwalla2
Social climber
WA
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Aug 26, 2018 - 08:03am PT
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I agree with Minerals. Slump/rock avalanche. I'm thinking it's likely that the granite in that area of the mountain contained jointing (cracks caused by contraction of the granite as it cooled, tectonic stresses, or release of confining pressure during uplift and erosion) that was preferentially oriented to facilitate slope failure. The trigger could have just been the "straw that broke the camel's back" - a dislodged boulder, melt water seeping into a crack and decreasing friction, etc. etc.
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phylp
Trad climber
Upland, CA
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Aug 26, 2018 - 01:24pm PT
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Fun to read about all this!
Those Idaho military jet pilots like their low altitude flying. Clint Cummins and I had one fly very close over us when we were near She's the Bosch in CoR one time, and we both dove to the ground, not knowing what the enormous instantaneous shadow was. I think we both thought something massive was falling on us.
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Robb
Social climber
Cat Box
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Aug 26, 2018 - 09:16pm PT
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Isn't it obvious that the mountain just felt that it was time for a good slough?
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Ksolem
Trad climber
Monrovia, California
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Aug 26, 2018 - 09:41pm PT
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For once I have to agree with Fritz.
Your circle needs to be a little bit higher though, Fritz, and to the left.
Higher and left, yes. And a lot smaller. You can clearly see the dark "rock" feature I've arrowed and the lighter colored screes slope above. They set the parameters.
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