USGS Visual Identifier
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Geologic Unit: Huckleberry Ridge

Usage:
Huckleberry Ridge Tuff of Yellowstone Group (ID*,MT*,WY*)
Huckleberry Ridge Tuff (AZ*,CA*,ID*,KS*,IA*,MT*,NE*,NV*,TX*,UT*,WY*)

Age:
Tertiary*
Pliocene*









Geologic Province:
Yellowstone province*
Snake River basin*
Great Basin province*
Wasatch uplift*
Sedgwick basin*
Central Montana uplift*
Salina basin*
Forest City basin*
Big Horn basin*
Anadarko basin*

Areal Extent:
AZ(se)*
CA*
ID(e)*
IA*
KS*
MT*
NE*
NV*
TX*
UT(w)*
WY(nw)*

Type Locality:
Type section: cliff exposure at head of large landslide 1.8 km N. 10 deg. E. of Snake River bridge, Flagg Ranch, Teton Co., WY (Christiansen and Blank, 1972).

Unit Name History:
Name proposed for the basal formation of Yellowstone Group; Isotopic dating (Christiansen and Blank, 1972).
Correlated with Pearlette type B ash (Naeser and others, 1973).
Misidentified (Pierce, 1974).
Revised (Christiansen and Love, 1978).
Age Modified to Pliocene (Love and Christiansen, 1980).
Areal limits, downwind equivalent informally called Huckleberry Ridge ash (Izett and Wilcox, 1982).
Isotopic dating; Areal limits (Love, 1989).

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