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National Geologic Map Database

Geologic Unit: Bromide

Usage:

Bromide Formation of Simpson Group (OK*,TX)


Subunits:

(alphabetical): Mountain Lake Member (OK), Pooleville Member (OK).


Geologic age:

Late Ordovician (late Whiterockian to Mohawkian; late Chazyan to Turinian)*


Type section, locality, area and/or origin of name:

Type section: along old road on hill northwest of old Galbraith Hotel in town of Bromide, in sec. 32, T. 1 S., R. 8 E., Johnson Co., Arbuckle Mountains, southeastern OK. Section exposed as faulted inlier in upper Simpson.


AAPG geologic province:

South Oklahoma folded belt*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).