Where: Wyoming (43.0° N, 106.8° W: paleocoordinates 13.1° N, 30.2° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Retort Phosphatic Shale Member (Phosphoria Formation), Lopingian (259.9 - 252.2 Ma)

• Davydov et al. 2017 dated an ash bed in the upper Meade Peak Member at 260.57 ± 0.07 / 0.14 / 0.31 Ma, indicating that the Meade Peak is as young as uppermost Capitanian.

• member-level stratigraphic resolution

Environment/lithology: marine; claystone and black limestone

Size classes: macrofossils, mesofossils

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 11224: authorized by Arnold Miller, entered by Chad Ferguson on 26.07.2001

Creative Commons license: CC BY (attribution)