- Usage in publication:
-
- Willow Tuff Member*
- Modifications:
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- Principal reference
- Dominant lithology:
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- Tuff
- AAPG geologic province:
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- Great Basin province
Summary:
Pg. 262 (fig. 4), 264, 285 (App. 1). Willow Tuff Member of Fulstone Spring Volcanics. Dacite ash-flow tuff. Thickness up to 200 m. Overlies latite and dacite porphyry domes and flows (unit 4) of the Fulstone Spring and unconformably underlies Cenozoic volcanic rocks. Previously called dacite ignimbrite of Willow Spring by Proffett and Dilles (1991, Geol. Soc. Nevada Field Trip Gdbk. Comp., v. 2, p. 1031-1036). Age is considered Middle Jurassic.
Type section: 1.5 km south and 10 deg. W. of Willow Spring, in sec. 23, T. 14 N., R. 23 E., Mount Como and Lincoln Flat 7.5-min quadrangles [1993 ed.], Yerington region, northern Buckskin Range, Douglas Co., west-central NV. Named from Willow Spring in the north-central Buckskin Range, [in SE/4 sec. 14, T. 14 N., R. 23 E., Lincoln Flat 7.5-min quadrangle (1993 ed.), Douglas Co., west-central NV].
Source: Publication.
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 ([ ]).