Where: Wibaux County, Montana (47.2° N, 110.2° W: paleocoordinates 7.4° S, 75.6° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Hintzeia celsaora trilobite zone, Deadwood Formation, Tulean (480.8 - 474.9 Ma)
• "L. Ord.. upper Arenig"
•Zone G
• group of beds-level stratigraphic resolution
Environment/lithology: lagoonal; fine-grained, medium, gray limestone and green shale
Size class: macrofossils
Primary reference: C. Lochman. 1966. Lower Ordovician (Arenig) faunas from the Williston Basin, Montana and North Dakota. Journal of Paleontology 40(3):512-548 [P. Wagner/P. Wagner/P. Wagner]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 174363: authorized by Pete Wagner, entered by Pete Wagner on 10.11.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Eocrinoidea | |
Eocrinoidea "stems" Jaekel 1918 | |
Conodonta | |
Drepanodus "sp. indet." Pander 1856 conodont | |
Lingulata | |
Lingulella "sp. indet." Salter 1866 | |
Rhynchonellata | |
Nanorthis putilla Walcott 1924 | |
Trilobita | |
Presbynileus "sp. indet." Hintze 1954 trilobite
Ptyocephalus montanensis trilobite |