Where: Billings County, North Dakota (48.0° N, 102.9° W: paleocoordinates 11.9° S, 74.5° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Tesselacauda trilobite zone, Deadwood Formation, Stairsian (485.4 - 478.6 Ma)
• "L. Ord. m. Arenig"; Zone E
• bed-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; limestone and shale
Size classes: macrofossils, mesofossils
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 414: authorized by Jack Sepkoski, entered by Mike Sommers on 03.12.1998
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
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Tropidodiscus sp. Meek and Worthen 1866 snail | |
"Raphistomina cf. sinclairensis" = Ceratopea sinclairensis
"Raphistomina cf. sinclairensis" = Ceratopea sinclairensis Kobayashi 1955 snail originally Raphistomina
| |
Rhynchonellata | |
| |
Lingulata | |
Lingulella "sp. undet." Salter 1866 | |
Trilobita | |
| |
Hystricurus sp. Raymond 1913 trilobite | |
Eocrinoidea | |
| |
Conodonta | |
Drepanodus sp. Pander 1856 conodont |