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click photo for larger file
Mount Tom and the Pine Creek Roof Pendant
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Photographer: Ron Wolf
ID: 0000 0000 0811 2858 (2011-08-24)Copyright © 2011 Ron Wolf
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Aug 8, 2011
location
Mount Tom. Inyo National Forest. Near Bishop (Inyo County, California, US)notes Mount Tom (elev. 13,658 ft.) is composed primarily of granitic plutons formed at great depth during Cretaceous time, about 100 million years ago. These magma intrusions have been exposed by uplift and erosion during the last 40 million years. Most of the mountain visible here is Tungsten Hills Quartz Monzonite. The top of the mountain is capped by much older metasedimentary rocks, a remnent of the roof of the magma chamber. This piece of the Pine Creek Roof Pendant is composed of micaeous quartzite formed during Pennsylvanian and Permian time, about 290 million years ago. In the Sierra, most of the older host rocks intruded by the plutons have eroded away but a few dozen patches of these roof pendants remain,keywords: geology, earth science, Mesozoic, Cretaceous, Paleozoic, Permian, Pennsylvanian, uplift, erosion, geomorphology
camera Canon 40D, 35mm, f/14, 1/125 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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