Usage:
Aleman Formation of Montoya Group (NM*,TX)
Aleman Dolomite of Montoya Group (NM*)
Aleman Dolomite Member of Montoya Dolomite (NM*)
Aleman Member of Montoya Formation (NM*)
Aleman Member of Montoya Dolomite (NM*,TX*)
Geologic age:
Late Ordovician (Cincinnatian; Maysvillian to Richmondian)*
Type section, locality, area and/or origin of name:
Type section (Cable Canyon section): on north side of canyon [Flordillo Canyon] opposite Sierrite Mine, in T. 16 S., R. 4 W., [approx. Lat. 32 deg. 55 min. 45 sec. N., Long. 107 deg. 14 min. 00 sec. W., Apache Gap 7.5-min quadrangle], Caballo Mountains, Sierra Co., southwestern NM. Named from Aleman Station along Santa Fe RR to east of the mountains in the Jornada del Muerto (Kelley and Silver, 1952). [See also Hayes and Cone, 1975, USGS Prof. Paper 873, Table 1, Loc. 15; Seager and Mack, 2003, New Mexico Bur. Geol. Min Res. Mem., no. 49, p. 16.]
AAPG geologic province:
Orogrande basin*
Pedregosa basin*
Permian 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 ([ ]).