Where: Montana (47.1° N, 109.4° W: paleocoordinates 17.4° N, 28.0° W)
• coordinate based on political unit
• basin-level geographic resolution
When: Grandeur Member (Park City Formation), Leonardian (286.0 - 273.0 Ma)
• Upper Leonardian
• member-level stratigraphic resolution
Environment/lithology: marine; grainstone
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 11281: authorized by Arnold Miller, entered by Chad Ferguson on 31.07.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Polidevcia cf. obesa White 1879 clam | |
Nuculopsis sp. Girty 1912 nut clam | |
Schizodus sp. King 1844 clam | |
Annuliconcha sp. Newell 1938 scallop | |
Scaphopoda | |
Plagioglypta sp. Pilsbry 1898 tusk shell | |
Strophomenata | |
Juresania sp. Fredericks 1928 | |
Hystriculina sp. Muir-Wood and Cooper 1960
Hystriculina cf. wabashensis Norwood and Pratten 1855 | |
Chonetes sp. Fischer de Waldheim 1830 | |
Derbyia sp. Waagen 1884 | |
Rhynchonellata | |
Neospirifer sp. Fredericks 1919 | |
Composita spp. Brown 1849 | |
Lingulata | |
Lingula sp. BruguiƩre 1797 | |
Stenolaemata | |
Fenestrata indet. Elias and Condra 1957 | |
| |
Trilobita | |
Trilobita indet. Walch 1771 trilobite | |
Gnathostomata | |
Osteichthyes indet. bony fish | |
Anthozoa | |
Rugosa indet. horn coral | |
Demospongiae | |
Haplistion sp. Young and Young 1877 demosponge |