Usage:
Sheep Pen Sandstone (CO,NM,OK)
Geologic age:
Triassic, Late
Norian
Type section, locality, area and/or origin of name:
Type locality: caps small mesa in E/2 NW/4 sec. 35, T. 32 N., R. 35 E., Cimarron Valley, Union Co., northeastern NM. Named from Sheep Pen Canyon which joins the Cimarron Valley about 0.5 mi northwest of type locality (Parker, 1933).
Type section: in N/2 SW/4 NE/4 sec. 35, T. 32 N., R. 35 E., Union Co., northeastern NM (Lucas and others, 1987).
AAPG geologic province:
Sierra Grande uplift
Anadarko basin
Palo Duro basin
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 ([ ]).