Locality 40, unit 54 (Silurian to of Canada)

Where: Northwest Territories, Canada (74.8° N, 93.5° W: paleocoordinates 3.0° N, 33.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: A Member (Read Bay Formation), Wenlock to Wenlock (433.4 - 423.0 Ma)

• 2 foot thickness

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, argillaceous lime mudstone

• Limestone; medium grey, weathering to light grey, massive, dense sublithographic

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 188789: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Encrinuridae
Encrinurus "sp. A" Emmrich 1844 trilobite
Encrinurus sp. Emmrich 1844 trilobite
 Athyridida - Nucleospiridae
 Spiriferida - Delthyrididae
Delthyris sp. Dalman 1828
 Atrypida - Lissatrypidae
"Atrypella cf. schrocki" = Atrypoidea, Atrypella cf. scheii
"Atrypella cf. schrocki" = Atrypoidea
Atrypella cf. scheii Holtedahl 1914
 Rhynchonellida - Camarotoechiidae
Camarotoechia "sp. C" Hall and Clarke 1893
 Euomphalina - Platyceratidae
"Cyclonema aff. decorum" = Cyclonema decora
"Cyclonema aff. decorum" = Cyclonema decora Billings 1866 snail
 Fenestrida - Fenestellidae
Fenestella sp. Lonsdale 1839
 Cystoporida - Fistuliporidae
 Trepostomata - Mesotrypidae
  - Receptaculitidae
Ischadites sp. Eichwald 1861