Where: Montana (47.1° N, 109.4° W: paleocoordinates 18.1° N, 28.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Meade Peak Phosphatic Shale Member (Phosphoria Formation), Roadian (272.3 - 268.8 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; phosphatic claystone and black limestone

Primary reference: E. L. Yochelson and D. H. Van Sickle. 1968. Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations; Geology of Permian Rocks in the Western Phosphate Field. United States Geological Survey Professional Paper 313(D):572-660 [A. Miller/C. Ferguson/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 11280: authorized by Arnold Miller, entered by Chad Ferguson on 30.07.2001, edited by Pete Wagner

Creative Commons license: CC BY (attribution)