Locality 34, unit 3 (Ordovician of Canada)

Where: Northwest Territories, Canada (75.0° N, 95.9° W: paleocoordinates 5.6° N, 39.5° 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)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green lime mudstone and poorly lithified shale

• light grey to olive-gray, weathering similar, thin-bedded, flaggy, hard, dense, sublithographic limestone; bedding planes irregular and composed of shale partings up to 0.25 inches thick

Size class: macrofossils

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

Collection methods: surface (in situ), mechanical,

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 188770: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Cephalopods identified by Walter C. Sweet and A. K. Miller, bryozoans by T. E. Bolton, corals, brachiopods, and arthropods by A. E. Wilson, graptolites and chordates by R. Thorsteinsson
 Corynexochida - Illaenidae
Bumastus "sp. C" Murchison 1839 trilobite
 Phacopida - Cheiruridae
Ceraurinus daedalus Cox 1933 trilobite
Ceraurus sp. Green 1832 trilobite
"Ostracoda" indet. Latreille 1802 ostracod
 Podocopida -
 Strophomenida - Sowerbyellidae
Sowerbyella sp. Jones 1928
 Strophomenida - Strophomenidae
"Strophomena fluctuosa" = Nasutimena fluctuosa, Oepikina sp.
"Strophomena fluctuosa" = Nasutimena fluctuosa Billings 1860
Oepikina sp. Salmon 1942
 Rhynchonellida - Rhynchotrematidae
"Rhynchotrema cf. capax" = Hiscobeccus capax, Rhynchotrema sp.
"Rhynchotrema cf. capax" = Hiscobeccus capax Conrad 1842
Rhynchotrema sp. Hall 1860
 Orthida - Dalmanellidae
? Resserella sp. Bancroft 1928
 Orthida - Glyptorthidae
 Orthida - Plaesiomyidae
Dinorthis sp. Hall and Clarke 1892
 Murchisoniina - Eotomariidae
? Liospira sp. Ulrich and Scofield 1897 snail
 Trepostomida -
Batostoma sp. Ulrich 1882
  - Phylloporinidae
Chasmatopora "sp. A" Eichwald 1860
Chasmatopora "sp. B" Eichwald 1860
 Sarcinulida - Syringophyllidae
"Calapoecia canadensis" = Calapoecia coxi
"Calapoecia canadensis" = Calapoecia coxi Bassler 1950 tabulate coral
 Lichenariida - Lyoporidae
Nyctopora "sp. A" Nicholson 1879 tabulate coral
 Heliolitida - Halysitidae
Halysites sp. von Waldheim 1813 tabulate coral
 Stauriida - Streptelasmatidae
Streptelasma "sp. B cf. breve" Hall 1847 horn coral