Locality 40, unit 51, lot 4 (Silurian of Canada)

Where: Northwest Territories, Canada (74.8° N, 93.5° W: paleocoordinates 3.7° N, 34.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: A Member (Read Bay Formation), Wenlock (433.4 - 427.4 Ma)

• unit is 228 feet thick; fauna in middle of unit

• group of beds-level stratigraphic resolution

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

• Argillaceous limestone; medium light-grey to medium grey, weathering to yellowish grey, very thin-bedded, flaggy, hard, dense, sublithographic to finely crystalline; numerous light grey shale partings; irregular bedding planes.

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 188803: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Athyridida - Meristellidae
 Spiriferida - Delthyrididae
Howellella "sp. A" Kozlowski 1946
 Atrypida - Lissatrypidae
"Atrypella cf. scrocki" = Atrypoidea, Atrypella borealis
"Atrypella cf. scrocki" = Atrypoidea
Atrypella borealis Kirk and Amsden 1952
 Rhynchonellida - Camarotoechiidae
Camarotoechia "sp. A" Hall and Clarke 1893
Camarotoechia "sp. B" Hall and Clarke 1893
 Murchisoniina - Loxonematidae
Loxonema "sp. A aff. rossi" Phillips 1841 snail
Loxonema "sp. B" Phillips 1841 snail