Stratigraphy

The stratigraphy of Wyoming is summarized in WSGS Map Series 41, the Stratigraphic Chart Showing Phanerozoic Nomenclature for the State of Wyoming (MS-41). Stratigraphic units on this chart are correlated along three generally west-east lines crossing mountains and basins.

Wyoming's Upper Cretaceous stratigraphy is detailed in WSGS OFR 2017-3, the Correlation of the Upper Cretaceous Strata of Wyoming (OFR 2017-3).

Contact:
Ranie Lynds, ranie.lynds@wyo.gov