Caution Creek Formation, Member 2 (Churchill River Exposure) (Ordovician to of Canada)

Where: Manitoba, Canada (58.0° N, 94.9° W: paleocoordinates 7.0° S, 51.0° W)

• coordinate estimated from map

When: 2 Member (Caution Creek Formation), Richmondian to Richmondian (449.6 - 443.7 Ma)

• "The Caution Creek Formation has its type section at Caution Creek, a small tributary of the Churchill."

• member-level stratigraphic resolution

Environment/lithology: dolomitic, gray limestone

• Environmental call by T. Hanson
• "Member No. 2 is . . . 18 feet thick. The rock is gray- to brown-weathering, light-yellowish-gray, crypto- to mictocrystalline, slightly dolomitic limestone and occurs in rather smooth layers about 1-2 inches thick. Organic detritus is relatively rare."

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 23013: authorized by Steven Holland, entered by Tori Hanson on 08.07.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
"Lepidocyclus gigas" = Hiscobeccus gigas, "Lepidocyclus perlamellosus" = Lepidocyclus perlamellosa
"Lepidocyclus gigas" = Hiscobeccus gigas Wang 1949
Lepidocyclus gigas Wang (?)
"Lepidocyclus perlamellosus" = Lepidocyclus perlamellosa Whitfield 1878
 Orthida - Plaesiomyidae
Dinorthis occidentalis2
Dinorthis occidentalis2 Okulitch 1943
 Atrypida - Anazygidae
Zygospira resupinata
Strophomenata
 Strophomenida - Furcitellidae
Oepikina limbrata1, Megamyonia nitens
Oepikina limbrata1 Wang 1949
Megamyonia nitens Billings 1860
 Strophomenida - Strophomenidae
Strophomena elongata, Strophomena sp. n. sp., "Strophomena planocorrugata" = Rugomena planocorrugata, "Strophomena fluctuosa" = Nasutimena fluctuosa
Strophomena sp. n. sp. Rafinesque and De Blainville 1824
"Strophomena planocorrugata" = Rugomena planocorrugata Twenhofel 1928
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860
1Jin and Zhan 2001; 2Wright and Stigall 2013