Usage:
Havallah Formation (NV*)
Havallah sequence (informal) (NV*)
For informal usage, the rank or lithologic term should not be capitalized.
Subunits:
(alphabetical) --all in NV*: Jory Member, Mill Canyon Member, Trenton Canyon Member.
Geologic age:
Permian, Early*
Pennsylvanian, Middle*
Type section, locality, area and/or origin of name:
On ridge south of Hoffman Canyon in Tobin Range, Golconda quadrangle, north-central NV. Named from Havallah Range which is Indian name for Tobin Range (40th Parallel Atlas) (Muller and others, 1951).
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 ([ ]).