- Usage in publication:
-
- Taylor Group
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Ouachita folded belt
Summary:
Two unnamed units of formation rank are named in central TX in Ouachita tectonic belt province--Bergstrom and Sprinkle Formations. Sprinkle Formation (formerly called "Lower Taylor Marl") is named as basal unit of Taylor. If Taylor is used as a group, both of these formations belong in the Taylor Group. If one uses Hill's (1901) division system of classification, the "Upper Taylor Marl" belongs to Taylor Division but the "Lower Taylor Marl" belongs to Austin Division, since it is a clay lithosome interfingering with the type Austin Chalk and is genetically part of Austin. The claystones of Sprinkle and Bergstrom are separated by Pecan Gap Formation, a chalk (or marly limestone). Is of Late Cretaceous age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Taylor Group
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- East Texas basin
Summary:
Taylor Group. Age is Late Cretaceous.
Not separately mapped. (Navarro Group, Taylor Group, and Austin Chalk [undifferentiated] mapped on Brooks dome in southwestern Smith Co., eastern TX.)
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 ([ ]).