No current usage.
(†Albuquerque Marl (NM) abandoned.)
late Tertiary
[Type locality not designated.] Named from occurrence on both sides of Rio Grande, in Albuquerque region, central northern NM (US geologic names lexicon, USGS Bull. 1200).
San Juan basin
Estancia 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 ([ ]).