Churchill River Exposure (Ordovician of Canada)

Where: Manitoba, Canada (58.0° N, 95.0° W: paleocoordinates 7.6° S, 52.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: 5 Member (Surprise Creek Formation), Maysvillian (452.0 - 449.5 Ma)

• Was Edenian - Richmondian.

• member-level stratigraphic resolution

Environment/lithology: dolomitic, gray limestone

• Environmental call by T. Hanson
• "Limestone, slightly dolomitic, light yellowish gray, cryptocrystalline, gray to dark gray weathering; and limestone, slightly dolomitic, microcrystalline. Alternating in regular beds 2 inches thick. Chert abundant in upper part."

Size class: macrofossils

Primary reference: S. J. Nelson. 1963. Ordovician paleontology of the Northern Hudson Bay lowland. Geological Society of America Memoir 90:1-152 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 23006: authorized by Steven Holland, entered by Tori Hanson on 08.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Stromatoporoidea
 Labechiida - Aulaceratidae
Beatricea nodulosa Billings 1857 stromatoporoid sponge