Locality 43, zone B (Ordovician of Canada)

Where: Northwest Territories, Canada (75.5° N, 96.1° W: paleocoordinates 4.3° N, 37.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Aphelognathus grandis conodont zone, Irene Bay Formation (Cornwallis Group), Richmondian (449.5 - 443.7 Ma)

• from upper 50 feet of formation

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified lime mudstone

Size class: macrofossils

Collected by R. Thorsteinsson in 1950-53; reposited in the GSC

Collection methods: surface (in situ),

Primary reference: R. Thorsteinsson. 1958. Cornwallis and Little Cornwallis Islands, District of Franklin, Northwest Territories. Geological Survey of Canada Memoirs 294:1-134 [M. Hopkins/M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188773: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified with help from T. E. Bolton (bryozoans) and A. E. Wilson (remainder)
Strophomenata
 Strophomenida - Strophomenidae
? Strophomena sp. Rafinesque and De Blainville 1824
Gastropoda
 Euomphalina - Macluritidae
Maclurites sp. Le Sueur 1818 snail
Cephalopoda
 Orthocerida - Dawsonoceratidae
Metaspyroceras sp. Foerste 1932
 Pseudorthocerida - Spyroceratidae
? Spyroceras sp. Hyatt 1884
Stenolaemata
 Trepostomida -
Chlorophyceae
  - Receptaculitidae
Receptaculites sp. Defrance 1827