- Usage in publication:
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- Roberts schist
- Roberts formation
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Schist
- Dolomite
- AAPG geologic province:
-
- Great Basin province
Maxson, J.H., 1934, Pre-Cambric stratigraphy of the Inyo Range [California] [abs.]: Pan-American Geologist, v. 61, no. 4, p. 311.
Summary:
Pg. 311; J.H. Maxson, 1935, GSA Proc. 1934, p. 314. Roberts schist (1934); Roberts formation (1935). Contorted schists and dolomites 2,500+/- feet in Wyman Canyon. Underlies (unconformably?) Wyman formation. Age is Precambrian.
Wyman Canyon section, Inyo Range, Bishop quadrangle (scale 1:125,000), Inyo Co., central eastern CA, consists of: Silver Peak shales, limestones and sandstones bearing OLENELLUS; the Campito sandstone, 2,000 feet; Deep Springs formation, 2,100 feet; Reed dolomite, 2,900 feet; Wyman schists, 3,700 feet; and Roberts schist, 2,500 feet.
Source: US geologic names lexicon (USGS Bull. 896, p. 1822).
- Usage in publication:
-
- Roberts formation
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Great Basin province
Summary:
Pg. 280 (fig. 4). Roberts formation. Thickness about 2,500 feet. Underlies Wyman formation. [Age is Precambrian.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 3296).
- Usage in publication:
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- Roberts Formation[†]
- Modifications:
-
- [Abandoned]
- AAPG geologic province:
-
- Great Basin province
Summary:
Pg. 140-141, 143 (fig. 3). [†] Roberts Formation. [Considered abandoned.] Detailed mapping in area of type section of the Wyman and Roberts formations and over large areas in the Waucoba Mountain and Waucoba Spring [15-min] quadrangles, Inyo County, California, suggests that no unconformity is present and that no persistent formational subdivision is presently possible. Accordingly the total succession of original Wyman and Roberts strata is referred to the Wyman Formation.
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 ([ ]).