U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Putnam

Usage:

Putnam Group (TX)
Putnam Formation of Wichita Group (TX*)
Putnam Formation of Cisco Group (TX)


Subunits:

GROUP STATUS (alphabetical) --all in TX: Coleman Junction Formation, Santa Anna Branch Formation.
FORMATION STATUS (alphabetical) --all in TX*: Coleman Junction Limestone Member, Santa Anna Branch Shale Member.


Geologic age:

Early Permian (Asselian to Artinskian; Wolfcampian)*


Type section, locality, area and/or origin of name:

Not designated. "Typically exposed" on the hillside west of town of Putnam, Callahan Co., TX (Plummer and Moore, 1922).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).