Abstract

The Brazer dolomite in its type area consists of about 850 ft. of dolomite with a few beds of quartz sandstone and limestone near the top. Although poorly fossiliferous, the lower two-thirds of the formation has yielded a fauna of Early Mississippian age that suggests correlation with the Mission Canyon limestone of the type Madison group. The upper third of the formation contains a meager fauna of uncertain affinities, interpreted as Late Mississippian in age. In as much as the Brazer cannot be recognized on a lithologic or faunal basis outside the type area, it is recommended that the name be restricted to the Mississippian dolomite sequence in the Crawford Mountains. New nomenclature should be devised for the Upper Mississippian limestone-sandstone facies, previously called Brazer, in the northern Cordilleran region.

You do not currently have access to this article.