Usage:
Aguja Formation (TX*)
Aguja Formation of Chilicotal Group (TX)
Aguja Formation of Tornillo Group (TX)
Geologic age:
Late Cretaceous (Campanian to Maastrichtian)*
Type section, locality, area and/or origin of name:
Type locality: Sierra Aguja (Needle Peak), in the flat in front of the Santa Helena fault scarp, 6 mi south of Terlingua, Brewster Co., western TX (Adkins, [1933]).
AAPG geologic province:
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 ([ ]).