Usage:
No current usage?
(†Bella Shale Member of Percha Shale (NM) considered abandoned? Uncertain if used by the NM Geol. Survey. Abandoned by the USGS, is synonym of Box Member of Percha Shale. See Box.)
Geologic age:
Late Devonian
Type section, locality, area and/or origin of name:
Named from Bella Mine, near Lake Valley, Sierra Co., southwestern NM (Keyes, 1908).
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 ([ ]).