Locality 40, unit 55 (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)

• 34 foot thickness

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, argillaceous limestone

• Argillaceous limestone; medium light-grey to medium grey, very thin-bedded, flaggy, dense, very finely crystalline; light grey shale parting

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 188788: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Spiriferida - Delthyrididae
Howellella "sp. A" Kozlowski 1946
 Pentamerida - Gypidulidae
Gypidula "sp. A" Hall 1867
 Atrypida - Lissatrypidae
"Atrypella sp." = Atrypoidea
"Atrypella sp." = Atrypoidea Mitchell and Dun 1920
 Rhynchonellida - Camarotoechiidae
Camarotoechia "sp. C" Hall and Clarke 1893
Gastropoda
 Euomphalina - Platyceratidae
Cyclonema sp. Hall 1852 snail
Stenolaemata
 Trepostomata - Halloporidae
Hallopora sp. Bassler 1911
 Trepostomata - Mesotrypidae
 Trepostomata - Trematoporidae
? Eridotrypa sp. Ulrich 1893
Anthozoa
 Favositida - Favositidae
Favosites gothlandicus Lamarck 1816 tabulate coral