Locality 40, unit 37 (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)

• unit is 17.9 feet thick

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray lime mudstone and lithified, gray reef rocks

• Limestone; biostromal, light olive-grey to greyish yellow, weathering to mottled greyish brown and greyish yellow, very thick-bedded, massive, hard, dense, mixed sublithographic and coarsely crystalline

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 188816: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Leperditicopida - Leperditiidae
Leperditia "sp. A" Rouault 1851 ostracod
 Athyridida - Meristellidae
? Whitfieldella sp. Hall and Clarke 1893
 Spiriferida - Delthyrididae
Howellella sp. Kozlowski 1946
 Pentamerida - Subrianidae
Conchidium "sp. A" Oehlert 1887
 Atrypida - Lissatrypidae
"Atrypella cf. shrocki" = Atrypoidea
"Atrypella cf. shrocki" = Atrypoidea
 Murchisoniina - Hormotomidae
Coelocaulus sp. Oehlert and Oehlert 1888 snail
 Favositida - Pachyporidae
Striatopora flexuosa Hall 1852 tabulate coral