Usage:
Great Blue Limestone (ID*,UT*)
Great Blue Formation (UT*)
Subunits:
(alphabetical): Chiulos Shale Member (UT*), Long Trail Shale Member (UT*), Paymaster Member (UT*), Poker Knoll Limestone Member (UT*), Topliff Limestone Member (UT*).
Geologic age:
Mississippian, Late*
Type section, locality, area and/or origin of name:
Named by miners; name retained because of its widespread use, even though no type locality designated and name Great Blue has no geographic significance (Gilluly, 1932).
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 ([ ]).