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National Geologic Map Database

Geologic Unit: Havallah

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 ([ ]).