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National Geologic Map Database

Geologic Unit: Madera

Usage:

Madera Group (NM*)
Madera Limestone (NM*,CO*)
Madera Formation (NM*,CO*)
Madera Limestone of Magdalena Group (NM*)
Madera Formation of Magdalena Group (NM*)
[†Magdalena Group not used by the NM Geol. Survey.]


Subunits:

GROUP STATUS (alphabetical) --all in NM: Alamitos Formation*, Atrasado Formation, Bar B Formation, Bursum Formation*, Gray Mesa Formation, Los Moyos Limestone*, Porvenir Formation*, Wild Cow Formation*.
FORMATION STATUS (alphabetical) --all in NM: Atrasado Member*, Gray Mesa Member*, Jemez Springs Shale Member, Red Tanks Member*, Whiskey Creek Pass Limestone Member.


Geologic age:

Middle Pennsylvanian (late Atokan) to Early Permian (Wolfcampian)*


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

Named from town of La Madera, Sandoval Co., central NM (Keyes, 1903).


AAPG geologic province:

Estancia basin*
Las Vegas-Raton basin*
Orogrande basin*
Palo Duro basin*
San Juan 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 ([ ]).