Usage:
Mazama Member of Mount Mazama Formation (CA,NV)
Subunits:
Tsoyawata Bed, /Mazama Bed.
[Mazama bed described in literature as informal Mazama ash, widely distributed throughout the western US and Canada.]
Geologic age:
Quaternary
Holocene
Type section, locality, area and/or origin of name:
Type section: "measured section 22a" of Morrison (1964), Stillwater Reservoir diversion canal, Humboldt Co., NV (Davis, 1978).
AAPG geologic province:
Great Basin 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 ([ ]).