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National Geologic Map Database

Geologic Unit: Juana Lopez

Usage:

Juana Lopez Member of Benton Shale (CO*)
Juana Lopez Member of Carlile Shale (CO*,KS,NM*)
Juana Lopez Member of Carlile Formation (NM*)
Juana Lopez Member of Mancos Shale (CO*,NM*, UT*)


Geologic age:

Late Cretaceous (Turonian)*


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

Type section: on the Mesita Juana Lopez Grant, 6 mi northwest of Cerillos, in sec. 32, T. 15 N., R. 7 E., Santa Fe Co., NM. Named from Mesita Juana Lopez Grant (Rankin, 1944).
Type section emended to NW/4 SE/4 sec. 33, T. 15 N., R. 7 E., Madrid quadrangle, Santa Fe Co., NM (Dane and others, 1966; Hook and Cobban, 1980).
Reference section: in SE/4 SW/4 sec. 14, T. 19 N., R. 1 W., La Ventana quadrangle, Sandoval Co., NM (Dane and others, 1966).


AAPG geologic province:

Denver basin*
Estancia basin*
Las Vegas-Raton basin*
North Park basin*
Paradox basin*
San Juan basin*
Uinta 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).