Stratigraphic sections of the Phosphoria formation in Wyoming, 1952

The U.S. Geological Survey has measured and sampled the Phosphoria formation of Permian age at many localities in Wyoming and adjacent states. These data will not be fully synthesized for many years, but segments of the data, accompanied by little or no interpretation, are published as preliminary reports as they are assembled. This report, which contains abstracts of the sections measured in western Wyoming (fig. 1), during 1952, is the fourth Wyoming report of this series. The field and laboratory procedures adopted in these investigations are described rather fully in a previous report (McKelvey and others, 1953a).

Many people have taken part in this investigation. T. M. Cheney participated in the description of strata and the collection of samples referred to in this report and T. K. Rigby assisted in the collection of samples. The laboratory preparation of samples for chemical analysis was done in Denver, Colo., under the direction of W. P. Huleatt.