Usage:
Aalenian Age*
Aalenian Stage*
Geologic age:
Middle Jurassic*
Type section, locality, area and/or origin of name:
GSSP: Fuentelsaz, Spain (ratified in 2000). See Episodes, v. 24, no. 3 (Sept.), p. 166-175, 2001, available online http://www.stratigraphy.org/GSSP/index.html
AAPG geologic province:
Cosmopolitan
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 ([ ]).