ammonites
BH-55-93 (Ordovician of Canada)

Where: Newfoundland and Labrador, Canada (51.6° N, 56.0° W: paleocoordinates 31.4° S, 48.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Strigigenalis brevicaudata trilobite zone, Barbace Cove Member (Boat Harbour Formation), Jeffersonian (488.3 - 468.1 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: peritidal; lithified, intraclastic, gray lime mudstone and wackestone

• "Lime mudstone, wackestone, packstone, and grainstone: locally intraclastic, dark blue-gray, light blue-gray weathering, thin and irregularly bedded; thin, buff dolomite laminae; some horizontal bioturbations; intraclasts flat pebbles up to 7 cm in diameter, and 2-cm thick."

Size class: macrofossils

Collected by W. D. Boyce in 1976-87

• 4.24 m thick unit collected at cm scale but only ranges reported. New biozone begins in top 60 cm of unit; these beds described in different collection record [=BH 94-95].

Primary reference: W. D. Boyce. 1989. Early Ordovician trilobite faunas of the Boat Harbour and Catoche Formations (St. George Group) in the Boat-Harbour-Cape Norman area, Great Northern Peninsula, western Newfoundland. Geological Survey Branch, Department of Mines and Energy, Newfoundland and Labrador, Report 89-2 1-168 [M. Hopkins/M. Hopkins] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 106236: authorized by Melanie Hopkins, entered by Melanie Hopkins on 04.03.2011