Usage:
/Flat Top formation (informal) (AZ)
[Term "Formation" is applied to formal nomenclature (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Tertiary
Miocene, middle
Miocene, late(?)
Type section, locality, area and/or origin of name:
Not designated. Origin of name not stated. Found in Anderson Mine area on south side Santa Maria River, in secs. 2, and 9 through 16, T. 11 N., R. 10 W., southwest Yavapai Co., AZ (Sherborne and others, 1979).
AAPG geologic province:
Basin-and-Range province
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 ([ ]).