Usage:
/Rusty zone (informal) in Ericson Formation (CO,WY)
Informal. The rank or lithologic term should not be capitalized. ["Zones" are intended to delineate rocks deposited during a time of existence of a particular faunal or floral assemblage (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Not designated (Hale, 1950).
AAPG geologic province:
Green River 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 ([ ]).