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National Geologic Map Database

Geologic Unit: Purgatoire

Usage:

No current usage?
(†Purgatoire Formation (CO*,NM*,OK*) considered abandoned? Uncertain if used by the CO, NM, and OK Geol. Surveys or the USGS. Possibly considered same as Lytle Sandstone and Glencairn Formation. See Lytle and Glencairn.)


Subunits:

(alphabetical): Cheyenne Sandstone Member (CO*,NM,OK*), Glencairn Shale Member (CO*), Kiowa Shale Member (CO*,NM,OK*), Lytle Sandstone Member (CO*).


Geologic age:

late Early Cretaceous (Albian)*


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

Not designated. Name from Purgatoire Canyon, Mesa de Maya quadrangle, Las Animas, Otero, and Bent Cos., CO (Stose, 1912).


AAPG geologic province:

Anadarko basin*
Denver basin*
Las Vegas-Raton basin*
Palo Duro basin*
Sierra Grande uplift*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).