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National Geologic Map Database

Geologic Unit: Jornada

Usage:

No current usage.
(Rocks of †Jornada Limestone of Montoya Group (NM) reallocated to, descending, Cutter Formation, Aleman Formation, and Upham Dolomite. See Aleman, Cutter, and Upham.)


Geologic age:

Late Ordovician (Cincinnatian)*


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

Notable exposures near Sierrite Mine in Cable Canyon section [Flordillo Canyon], 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 (Kelley, 1951). [See also Kelley and Silver, 1952, pl. 4B; 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


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 ([ ]).