Where: Montana (47.1° N, 109.4° W: paleocoordinates 17.9° N, 29.5° W)
• coordinate based on political unit
• basin-level geographic resolution
When: Franson Member (Park City Formation), Wuchiapingian (259.9 - 254.2 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; lime mudstone and grainstone
Size class: macrofossils
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 11279: authorized by Arnold Miller, entered by Chad Ferguson on 30.07.2001, edited by Matthew Clapham and Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Polidevcia cf. obesa White 1879 clam | |
Schizodus sp. King 1844 clam | |
Edmondia stuchburia clam | |
Permophorus albequus Beede 1907 clam | |
| |
Aviculopecten sp. M'Coy 1851 scallop | |
Gastropoda | |
| |
"Knightites (Retispira) eximia" = Yochelsonellisa eximia
"Knightites (Retispira) eximia" = Yochelsonellisa eximia Yochelson 1960 snail | |
Scaphopoda | |
Plagioglypta sp. Pilsbry 1898 tusk shell | |
"Plagioglypta canna" = Prodentalium canna
"Plagioglypta canna" = Prodentalium canna White 1874 tusk shell | |
Strophomenata | |
Sphenosteges sp. Muir-Wood and Cooper 1960 | |
Rhynchonellata | |
Neospirifer sp. Fredericks 1919 | |
"Neospirifer pseudocameratus" = Timaniella pseudocamerata
"Neospirifer pseudocameratus" = Timaniella pseudocamerata Girty 1920 | |
Wellerella cf. osagensis Shumard and Swallow 1858 | |
Composita sp. Brown 1849 | |
Lingulata | |
Orbiculoidea sp. d'Orbigny 1847
Orbiculoidea (Roemerella) utahensis Meek 1877 | |
Lingula sp. Bruguiére 1797 | |
Stenolaemata | |
Fenestrata indet. Elias and Condra 1957 | |
| |
Anthozoa | |
Rugosa indet. horn coral | |
unclassified | |
Porifera indet. Grant 1836 |