ammonites
Amerada, Herman-May No.1 Fryburg Area 13,237' ft (Ordovician of the United States)

Where: Billings County, North Dakota (48.0° N, 102.9° W: paleocoordinates 11.9° S, 74.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Tesselacauda trilobite zone, Deadwood Formation, Stairsian (488.3 - 478.6 Ma)

• "L. Ord. m. Arenig"; Zone E

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; limestone

• "sh., ls and ss. ? lower shoreface or nearshore shelf lagoon. cratonic shelf"
• coarse- to medium-grained limestone matrix filled with many glauconitized gastropod steinkerns, some small glauconite-coated limestone pebbles, and brachiopod shells; large glauconite grains; some patches of crinoid joint hash.

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 119477: authorized by Pete Wagner, entered by Pete Wagner on 27.10.2011