- Usage in publication:
-
- South Bosque Formation
- Modifications:
-
- Mapped 1:250k
- Dominant lithology:
-
- Shale
- Limestone
- AAPG geologic province:
-
- Ouachita folded belt
Summary:
South Bosque Formation of Eagle Ford Group. Shale and limestone; mostly shale, bentonitic in lower part, soft, blocky, homogenous, dark gray to black, weathers medium gray to yellowish brown; limestone beds scarce, more abundant downward, flaggy. Thickness 30 to 150 feet, thins southward. Lies above Lake Waco Formation of Eagle Ford and below Austin Chalk. Age is Late Cretaceous.
Mapped in Bell, McLennan, and Hill Cos., 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 ([ ]).