Locality 16 (Ordovician of Canada)

Where: Northwest Territories, Canada (75.4° N, 95.5° W: paleocoordinates 4.1° 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)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• middle of formation: limestone, argillaceous limestone, and dolomitic limestone, alternating with yellowish gray massive dolomite

Size class: macrofossils

Collected by R. Thorsteinsson in 1950-53

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 188772: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified by A. E. Wilson and T. E. Bolton
 Proetida - Bathyuridae
Bathyurus "sp. A" Billings 1859 trilobite
Bathyurus "sp. B" Billings 1859 trilobite
 Strophomenida - Rafinesquinidae
Rafinesquina sp. Hall and Clarke 1892
Rafinesquina semicircularis
subspecies minor?
 Strophomenida - Strophomenidae
Strophomena sp. Rafinesque and De Blainville 1824
Trigrammaria sp. Wilson 1945
Oepikina sp. Salmon 1942
 Orthida - Plectorthidae
Plectorthis cf. plicatella Hall 1847
subspecies trentonensis
 Trochonematoidea - Lophospiridae
Lophospira sp. Whitfield 1886 snail
 Bellerophontida - Bucaniidae
Bucania sp. Hall 1847 snail
 Cryptostomida -
Rhinidictya sp. Ulrich 1882