- Usage in publication:
-
- Malachite Mine Formation*
- Modifications:
-
- Original reference
- Dominant lithology:
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- Argillite
- Limestone
- Sandstone
- AAPG geologic province:
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- Great Basin province
Summary:
Pg. 255 (fig. 3), 256-257, 285 (App. 1). Malachite Mine Formation. Divided into (ascending): (1) dolomitic limestone member, 8 to 75 m thick; (2) black calcareous argillite member, 210 to 245 m thick; and (3) volcanic sandstone and limestone member, 145 to 180 m. Total thickness 400 to 600 m. Overlies McConnell Canyon Volcanics and underlies tuff of Western Nevada Mine (rhyolitic and andesitic tuff). Age is considered Late Triassic (Carnian to Norian) based on fossils.
Type section: in vicinity of Malachite Mine, in McConnell Canyon, in secs. 31 and 32, T. 13 N., R. 25 E., Yerington 7.5-min quadrangle [1986 prov. ed.], Yerington region, Singatse Range, Lyon Co., west-central NV. Named from the mine.
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 ([ ]).