Also known as 21SA
Where: Manitoba, Canada (55.9° N, 92.2° W: paleocoordinates 9.5° S, 51.3° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Amorphognathus ordovicicus conodont zone, 1 Member (Caution Creek Formation), Richmondian (449.6 - 445.5 Ma)
• formation-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 192101: authorized by Pete Wagner, entered by Pete Wagner on 08.03.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
| Strophomenata | |
|
Megamyonia nitens Billings 1860 | |
"Strophomena fluctuosa" = Nasutimena fluctuosa, Strophomena vetusta
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860
Strophomena vetusta James 1874 | |
| Rhynchonellata | |
|
Hiscobeccus gigas Wang 1949
Hiscobeccus capax Conrad 1842 | |
|
| |
|
Dinorthis occidentalis Okulitch 1943
Plaesiomys subquadratus Hall 1847 | |