Locality 40, unit 36 (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 15.2 feet thick

• group of beds-level stratigraphic resolution

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

• Limestone; light grey to medium light-grey, weathering to light grey and greyish yellow, very thin-bedded, flaggy, sublithographic to very finely crystalline; shale partings

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 188817: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Atrypida - Lissatrypidae
"Atrypella cf. shrocki" = Atrypoidea, Atrypella borealis
"Atrypella cf. shrocki" = Atrypoidea
Atrypella borealis Kirk and Amsden 1952
 Trepostomata - Mesotrypidae
 Trepostomata - Trematoporidae
? Eridotrypa sp. Ulrich 1893