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click photo for larger file
Jointing in the Sentinel Granodiorite
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Photographer: Ron Wolf
ID: 0000 0000 0811 1546 (2011-08-14)Copyright © 2011 Ron Wolf
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Jul 28, 2011
location
Near Taft Point. Yosemite National Park (Mariposa County, California, US)notes These joints are part of a regional system of widely-spaced, vertical master joints that are responsible for most of the distinctive sheer cliffs lining Yosemite Valley. Regional master joints are the result of stress produced by the tectonic forces involved in the tilting and uplift of the modern Sierra. The Sentinel Granodiorite was formed by the intrusion of magma during the Cretaceous period, about 93 million years ago. Development of these joints occurred over the last 40 million years during the uplift of the modern Sierra.keywords: geology, earth science. tectonics, uplift, joints, jointing
camera Canon 40D, 15mm, f/16, 1/160 sec.
photo category: Misc. - geology
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Using this photo The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2011 Ron Wolf.
For other uses, or if you have questions, contact Ron Wolf RonWolf[AT]EyeOnNature.com. (Replace the [AT] with the @ symbol before sending an email.) |
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