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National Geologic Map Database

Geologic Unit: Bridge Creek

Usage:

Bridge Creek Limestone Member of Mancos Shale (CO*,NM*)
Bridge Creek Limestone Member of Greenhorn Formation (CO*,NM*,OK*)
Bridge Creek Member of Greenhorn Limestone (CO*,KS)
Bridge Creek Limestone Beds of Rio Salado Tongue of Mancos Shale (NM*)


Geologic age:

Late Cretaceous (Cenomanian to Turonian)*


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

Named from exposures on Bridge Creek, northwest of Medway, Hamilton Co., KS (Bass, 1926).
Type locality: in sec. 14, 22, and 23, T. 23 S., R. 42 W., Hamilton Co., KS (Cobban and Scott, 1972).
Principal reference section: in NW/4 NE/4 sec. 31, and SW/4 and NW/4 NW/4 sec. 30, T. 20 S., R. 65 W., Pueblo Co., CO (Cobban and Scott, 1972).


AAPG geologic province:

Anadarko basin*
Basin-and-Range province*
Denver basin*
Las Animas arch*
Las Vegas-Raton basin*
Orogrande basin*
Salina basin*
San Juan 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 ([ ]).