- Usage in publication:
-
- Falls City shale
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Shale
- Sandstone
- AAPG geologic province:
-
- Gulf Coast basin
Summary:
Pg. 1302, 1314, etc. Falls City shale. Series of chocolate-covered bentonitic shales and carbonaceous shales with thin lenses of sand, in places fossiliferous. As TEXTULARIA HOCKLEYENSIS is found in these shales it is advisable to name them so as to differentiate them from the McElroy. The shale also carries typical Whitsett species. Is a lower zone of Whitsett formation as here defined. Occurs in Fayette, Gonzales, Karnes and Atascosa Counties, southeastern Texas. Overlies Dilworth sand (basal Whitsett) and underlies Stone's Switch sand. Age is Eocene (Jackson).
Type locality: west of Falls City, in bed of San Antonio River, forming the falls of the river.
Source: US geologic names lexicon (USGS Bull. 896, p. 719).
- Usage in publication:
-
- Falls City shale
- Modifications:
-
- Not used
- AAPG geologic province:
-
- Gulf Coast basin
Summary:
Pg. 2631. Falls City shale replaced with Conquista clay member (new) of McElroy formation. Name Falls City preempted.
Source: US geologic names lexicon (USGS Bull. 1200, p. 1318).
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 ([ ]).