GSC loc. 25302. Left bank of South Knife River (Ordovician of Canada)

Also known as 17SA; 232CE; 217SA

Where: Manitoba, Canada (58.5° N, 95.0° W: paleocoordinates 6.6° S, 50.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: 1 Member (Caution Creek Formation), Richmondian (449.6 - 445.5 Ma)

• GSC loc. 25302. 2.1 m section of Caution Creek Formation assigned to Member 3 by Nelson but according to Cumming (1975, p. 23), probably Member 1 and near the base of the Caution Creek Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: dolomitic, gray mudstone and shelly/skeletal packstone

• The formation is composed predominantly of light 12 grey, slightly dolomitic, micritic mudstones with interbeds of bioclastic packstone. Members 1 and 3 can be discriminated from Member 2 by their irregular bedding and rubbly- or nodular-weathering appearance. Member 1 is much more fossiliferous than the other two.

Size class: macrofossils

Reposited in the GSC

Primary reference: J. Jin, W. G. E. Caldwell, and B. S. Norford. 1997. Late Ordovician brachiopods and biostratigraphy of the Hudson Bay Lowlands, northern Manitoba and Ontario. Bulletin of the Geological Survey of Canada 513:1-115 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 166654: authorized by Pete Wagner, entered by Pete Wagner on 21.02.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Strophonellidae
"Strophomena semiovalis" = Eostrophonella semiovalis
"Strophomena semiovalis" = Eostrophonella semiovalis Shaler 1865
 Strophomenida - Furcitellidae
Megamyonia nitens Billings 1860
 Strophomenida - Strophomenidae
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
Hiscobeccus capax Conrad 1842
 Orthida - Plaesiomyidae