Usage:
Eastland Lake Formation of Smithwick Group (TX-subsurface)
Geologic age:
Pennsylvanian
Type section, locality, area and/or origin of name:
Type section (subsurface): depth-interval 3,960 to 4,225 ft, Anzac Oil Corp. et al. E.S. Graham No. 1, in Allen Hines Survey, Abstract 135, central Young Co., north-central TX. Named from Eastland Lake district of northwest Eastland Co., north-central TX (Cheney, 1940).
AAPG geologic province:
Bend arch
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 ([ ]).