Where: Wyoming (43.0° N, 109.0° W: paleocoordinates 14.3° N, 31.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Franson Member (Phosphoria Formation), Wuchiapingian (259.9 - 254.2 Ma)

• "Thin phosphate bed at top of Pustula Member" indicates uppermost part of Franson member. 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.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, phosphatic shale

Size class: macrofossils

Primary reference: C. C. Branson. 1933. Fish fauna of the middle Phosphoria Formation. Journal of Geology 41:174-183 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90239: authorized by Matthew Clapham, entered by Matthew Clapham on 14.07.2009

Creative Commons license: CC BY (attribution)