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click photo for larger file
Fumarolic Mounds in the Bishop Tuff
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Photographer: Ron Wolf
ID: 0000 0000 0811 2410 (2011-08-18)Copyright © 2011 Ron Wolf
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INFORMATION PROVIDED WITH THE PHOTO
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date of photo Aug 7, 2011
location
BLM Volcanic Tableland. North of Bishop (Inyo County, California, US)notes These hummocks dotting the Volcanic Tableland north of Bishop are the remains of fumaroles (steam vents) that developed in the Bishop Tuff shortly after it was deposited. The formation, which is 600 feet thick in places, was formed in a matter of days from rhyolitic ash ejected during an enormous eruption 760,000 years ago at Long Valley, about 20 miles to the north. This avalanche of hot clastic material converted ground water in the area to steam, which created these vents as it escaped upward through the blanket of ash. As the steam condensed, it deposited silica around the vents, leaving areas that were more resistant to erosion than the rest of the surrounding tuff.keywords: geology, earth science, volcano, volcanism, ash flow, deposition, fumarole, tuff, Pleistocene, Quaternary, geomorphology
camera Canon 40D, 50mm, f/14, 1/80 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.
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