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Posts treating: "Stanislaus Table Mountain"

Monday, 20 April 2015

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Where the Rivers are "Upside-Down": A Hike to the Stanislaus Table Mountain 

Geotripper [2015-04-20 07:45:00]  recommend  recommend this post  (674 visits) info

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Around 10 million years ago, a lava flow surged from a volcano near present-day Sonora Pass in the Sierra Nevada. Composed of latite, but non-viscous like basalt, it flowed off the volcano and into the channel of the ancestral Stanislaus River, eventually flowing close to sixty miles. The river eventually eroded another valley and the lava flow was left relatively intact. The Sierra Nevada
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