- Usage in publication:
-
- Chinati series
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Shale
- Conglomerate
- Limestone
- AAPG geologic province:
-
- Permian basin
Summary:
Pg. 10-25. Chinati series. Shales, conglomerates, and limestones, 5,938 feet thick, changing from conglomeratic rocks below, through arenaceous beds and clays to limestones above. Divided into (descending) Cibola limestones, Alta beds, and Cienguita beds. Fossiliferous. Unconformably underlies Lower Cretaceous Presidio beds and overlies granite. [Age is Permian.]
Recognized in Shafter district, Presidio Co., southwestern TX.
[GNC remarks: (1) ca. 1930, US geologic names lexicon, USGS Bull. 896, p. 432. Age is considered Permian (C.L. Baker, 1929, Univ. Texas Bull., no. 2901, p. 73+). Is a local name for all Permian in Chinati Mountains; (2) ca. 2022. When referring to the Chinati series of Udden (1904), please use informally. The practice of employing "Series" for lithostratigraphic or lithodemic nomenclature is now regarded as improper (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). The term "Series" is applied formally only to chronostratigraphic units.]
Source: US geologic names lexicon (USGS Bull. 896, p. 432).
- Usage in publication:
-
- Chinati series
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Permian basin
Skinner, J.W., 1940, Upper Paleozoic section of Chinati Mountains, Presidio County, Texas: American Association of Petroleum Geologists Bulletin, v. 24, no. 1, p. 180-188.
Summary:
Chinati series. Udden recognized three formational divisions in Chinati series (ascending): Cieneguita, Alta, and Cibolo. He assigned entire series to Permian. Present report is a study of section selected as type of all three of his formations. Concluded that Udden's original age assignment was very nearly correct, much more so than later correlations based on fossils collected from exposures other than type locality.
Source: US geologic names lexicon (USGS Bull. 1200, p. 774).
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 ([ ]).