Abstract
Three new formational units are proposed for the Upper Cambrian strata of southern Montana. The term Gallatin has been eliminated, as its use in any sense other than the original definition of Peale is invalid as well as confusing. Recent work has shown that Upper Cambrian formation names used in central Montana cannot be extended into the southern area. The relationship of the southern Montana sections to well-known sections in central Montana and northern Wyoming is briefly discussed.
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