- Usage in publication:
-
- Comet shale
- Modifications:
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- Original reference
- AAPG geologic province:
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- Great Basin province
Mason, J.F., 1936, [Pioche and Highland Ranges, Nevada]: Peking National University Press, p. 274-276., 2nd edition
Summary:
[Written commun. from John F. Mason, Princeton Univ., Oct. 6, 1935, on his latest studies in the Pioche and Highland Range region, Nevada]. Comet shale. Predominantly shaly beds 545 feet thick. Underlies Lyndon limestone; overlies Forlorn Hope shale (new). Pioche shale of Walcott (1908), and Westgate and Knopf (1927) includes Comet shale, Forlorn Hope shale, and Pioche shale as used here. Fossils (trilobites, mollusks). Age is Middle Cambrian [based on fossils].
Source: US geologic names lexicon (USGS Bull. 1200, p. 903).
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 ([ ]).