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National Geologic Map Database

Geologic Unit: Ajax

Usage:

Ajax Dolomite (UT*-notable exposures in Tintic district)


Subunits:

Emerald Dolomite Member (UT*).


Geologic age:

Late Cambrian (Millardan; Sunwaptan)*; locally Late Cambrian to Early Ordovician*


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

[Type locality not designated.] Named from Ajax Mine, [Lat. 39 deg. 55 min. 38 sec. N., Long. 112 deg. 06 min. 46 sec. W., Eureka 7.5-min quadrangle, Juab Co.], 0.25 mi east of Mammoth, Tintic district, central northern UT (Loughlin, IN Lindgren and Loughlin, 1919).


AAPG geologic province:

Great Basin province*
South Western Overthrust*
Wasatch uplift*


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