Usage:
Bear Spring Formation (TX*)
Geologic age:
early Middle Devonian (Eifelian)*
Type section, locality, area and/or origin of name:
Type locality: [2.2 mi east of Bear Spring], near head of east fork of a draw that enters south side of valley of Honey Creek, about 280 ft upstream from rock cabin on Roy Zesch Ranch, Mason Co., central TX (Barnes and others, 1947).
AAPG geologic province:
Llano uplift*
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 ([ ]).