- Usage in publication:
-
- Wales Canyon Tuff Member
- Modifications:
-
- Named
- Dominant lithology:
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- Tuff
- AAPG geologic province:
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- Great Basin province
- Wasatch uplift
Summary:
Named as basal member of Dry Hollow Formation for exposures on east side of Wales Canyon in Millard Co, UT in Great Basin province. Extends east into Sevier Co on Wasatch uplift. No type locality designated. Is an ash-flow tuff containing 30 to 40 percent phenocrysts (mostly feldspar, hornblende, and biotite). The groundmass is fine grained and glassy, and occasionally finely vesicular. Forms an outcrop with platy weathering. Is about 100 m thick. Overlies Bullion Canyon Volcanics; underlies Clear Creek Tuff Member (new) of Dry Hollow Formation. Assigned a Miocene age. Geologic map.
Source: GNU records (USGS DDS-6; Denver GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).