- Usage in publication:
-
- Briggs formation*
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Gypsum
- Limestone
- AAPG geologic province:
-
- Permian basin
Summary:
Pg. 19. Section in Malone Mountains shows Briggs formation consists of gypsum with interbedded limestones. Thickness more than 300 feet. Separated from Upper Jurassic Malone formation (emended) by unconformity. Age is Early Permian.
Named from Briggs (now Gypsum) switch on Southern Pacific RR, Hudspeth Co., Malone Mountains area, west-central TX.
Source: US geologic names lexicon (USGS Bull. 1200, p. 478).
- Usage in publication:
-
- Briggs formation*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Permian basin
Summary:
Pg. 1753-1757. Includes minimum of 630 feet of anhydrite and gypsum with interbedded limestone; base of formation not exposed. Interbedded bodies of limestone range from laminae of microscopic dimensions to lenses more than 100 feet thick and several miles in width. Three lenses of sufficient magnitude to be mapped and considered as members are described (ascending): Black limestone member as much as 150 feet thick; black brecciated limestone member as much as 80 feet thick; and buff limestone member. At least in part equivalent to Leonard formation in Glass Mountains. Age is Early Permian.
Source: US geologic names lexicon (USGS Bull. 1200, p. 478).
- Usage in publication:
-
- Briggs formation
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Permian basin
Summary:
Pg. 992 (fig. 2), 994-995. In northern Quitman Mountains, consists only of medial black brecciated limestone member. Thickness about 200 feet. Age is Early Permian.
Source: US geologic names lexicon (USGS Bull. 1200, p. 478).
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 ([ ]).