Markley Formation of Bowie Group (TX)
(alphabetical) --in TX: Breckenridge Limestone Member, Crystal Falls Limestone Member.
Pennsylvanian, Late
Virgilian
Permian, Early
Wolfcampian
Stratotype: from base of road cut on north side of Farm Road 1769 about 2.7 mi west of Farm Road 1769's intersection with TX Highway 16 at Markley in northeastern Young Co., TX. Named from Markley (Hentz, 1988).
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 ([ ]).