Locality 40, unit 51, lot 5 (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 228 feet thick; fauna nearer to bottom than top 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 188804: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844 trilobite
Strophomenata
 Strophomenida - Leptostrophiidae
? Brachyprion sp. Shaler 1865
Rhynchonellata
 Spiriferida - Delthyrididae
Howellella "sp. A" Kozlowski 1946
 Atrypida - Lissatrypidae
Atrypella cf. borealis Kirk and Amsden 1952
Atrypella scheii Holtedahl 1914
 Orthida - Dalmanellidae
? Onniella sp. Bancroft 1928