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click photo for larger file
Chert Nodules in the Keeler Canyon Formation
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Photographer: Ron Wolf
ID: 0000 0000 0612 1079 (2012-06-17)Copyright © 2012 Ron Wolf
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Apr 16, 2012
location
Marble Canyon. Death Valley National Park (Inyo County, California, US)notes These nodules of microcrystalline silicon dioxide are embedded in the Keeler Canyon Formation, a limestone of Pennsylvanian age. They formed as concretions in soft carbonate-rich sediments. They grew from silica dissolved in ground water. Similar chert nodules are found in many Paleozoic limestones and dolomites around the world.keywords: Geology, Earth Science, petrology, chert, concretion, limestone, Pennsylvanian, Paleozoic
camera Canon EOS 7D, 35mm, f/10, 1/500 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 © 2012 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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