Extent of Lava Creek ash bed.

Tuff Cliff showing the Lava Creek Tuff formation.

Lava Creek Tuff is a tuff formation created when the Yellowstone Caldera erupted about 640,000 years ago.^[1]

The Lava Creek Tuff distributed in a radial pattern around the caldera and is formed of 1,000 cubic kilometres (240 cu mi) of ash in pyroclastic flows.^[2]

The tuff has been exposed by erosion at Tuff Cliff along the Gibbon River.^[3]

Lava Creek Tuff ranges in color from light-gray to pale red in some locales. Density of the tuff ranges from fine-grained to aphanitic and is densely welded. Thickness of the tuff layer ranges from 180–200 m (590–660 ft).^[4]

[edit] See also

• Snake River Plain
• Island Park Caldera
• Henry's Fork Caldera

[edit] References

1. ^  "Undine Falls, Lava Creek, Yellowstone National Park". Yellowstone Volcano Observatory. http://volcanoes.usgs.gov/yvo/images/20010519-082_caption.html. Retrieved 2005-09-16. 
2. ^  Lisa Morgan. "Yellowstone Lake Geology Talk Transcript - The floor of Yellowstone Lake is anything but quiet: Volcanic and hydrothermal processes in a large lake above a magma chamber, February 10, 2004". Yellowstone Science Talks. Archived from the original on 2004-05-01. http://web.archive.org/web/20040501035126/http://www.nps.gov/yell/nature/sciencetalks/transcriptmorgan1.htm. Retrieved September 16 2005. 
3. ^  "U.S. Geological Survey Scientific Investigations Map 2816" (PDF). http://permanent.access.gpo.gov/websites/pubsusgsgovproducts/pubs.usgs.gov/sim/2004/2816/2816_508.pdf. Retrieved September 16 2005. 

v • d • e   State of Wyoming Cheyenne (capital) Topics Governors | Geography | Government | Economy | History | People | Visitor Attractions | State Symbols | Radio Stations Regions Black Hills | Grand Teton | Great Basin | Powder River Country | Red Desert | Yellowstone Cities Buffalo | Casper | Cheyenne | Cody | Douglas | Evanston | Gillette | Green River | Jackson | Lander | Laramie | Powell | Rawlins | Riverton | Rock Springs | Sheridan | Torrington | Worland Counties Albany | Big Horn | Campbell | Carbon | Converse | Crook | Fremont | Goshen | Hot Springs | Johnson | Laramie | Lincoln | Natrona | Niobrara | Park | Platte | Sheridan | Sublette | Sweetwater | Teton | Uinta | Washakie | Weston

This volcanology article is a stub. You can help Wikipedia by expanding it. v • d • e

This article about a specific stratigraphic formation is a stub. You can help Wikipedia by expanding it. v • d • e