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

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 119478: authorized by Pete Wagner, entered by Pete Wagner on 27.10.2011

Creative Commons license: CC BY (attribution)