Usage:
Thrifty Formation of Cisco Group (TX*)
[?] Thrifty Group (TX)
Subunits:
GROUP STATUS (alphabetical) --all in TX: Avis Sandstone, Chaffin Formation, Crystal Falls Limestone, Obregon Formation, Speck Mountain Formation.
FORMATION STATUS (alphabetical) --all in TX: Avis Sandstone Member, Belknap Limestone Member*, Blach Ranch Limestone Member*, Breckenridge Limestone Member*, Chaffin Limestone Member*, Crystal Falls Limestone Member*, Ivan Limestone Member, Lohn Shale Member*, Parks Mountain Sandstone Member*, Speck Mountain Limestone Member*.
Geologic age:
Late Pennsylvanian (Virgilian)*
Type section, locality, area and/or origin of name:
Not designated. Named from town of Thrifty in center of Brown Co., TX (Plummer and Moore, 1922).
AAPG geologic province:
Bend arch*
Fort Worth syncline*
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 ([ ]).