USGS Visual Identifier
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Geologic Unit: Lava Creek

Usage:
Lava Creek Tuff of Yellowstone Group (ID*,MT*,WY*)
Lava Creek Tuff (CO)
Lava Creek ash (informal) (CA*,CO*,ID*,IA*,KS*,MT*,NE*,NV*,NM*,OK*,SD*,TX*,UT*,WY*)
For informal usage, the rank or lithologic term should not be capitalized.

Age:
Quaternary*
Pleistocene*



























Geologic Province:
Central Kansas uplift*
Wasatch uplift*
Iowa shelf*
Sedgwick basin*
San Juan Mountains province*
San Juan basin*
Piceance basin*
Las Vegas-Raton basin*
Eagle basin*
Gulf Coast basin*
Chadron arch*
Sioux uplift*
Anadarko basin*
Basin and Range province*
Sierra Grande uplift*
Orogrande basin*
Estancia basin*
Pedregosa basin*
Permian basin*
Palo Duro basin*
Great Basin province*
Salina basin*
Chadron arch*
Williston basin*
Powder River basin*
Yellowstone province*
Denver basin*
Green River basin*
Big Horn basin*
Areal Extent:
CA*
CO*
ID*
IA*
KS*
MT*
NE*
NV*
NM*
OK*
SD*
TX*
UT*
WY(nw)
















Type Locality:
Type area: Upper Canyon of Lava Creek, and its tributary, Arrow Canyon, in Yellowstone National Park, Park Co., WY. Named from Lava Creek (Christiansen and Blank, 1972).
Principal reference sections: (1) lower informal member in south-facing cliff of Purple Mountain, above old gravel pit, about 1 km east of Madison Junction; (2) upper informal member in east wall of Sheepeater Canyon, Garder River, 1 km northeast of Osprey Falls (Christiansen and Blank, 1972).

Unit Name History:
Name proposed for the upper formation of Yellowstone Group; Isotopic dating (Christiansen and Blank, 1972).
Overview (Naeser and others, 1973).
Areal limits of informally designated Lava Creek A and Lava Creek B ashes (Izett and Wilcox, 1982).
Areal limits, Lava Creek B identified in San Juan basin (Dethier and others, 1990).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).






U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013