Locality 23, unit 4 (Silurian to of Canada)

Where: Northwest Territories, Canada (74.7° N, 94.7° W: paleocoordinates 3.1° N, 33.5° 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 6.1 feet thick

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, massive, gray reef rocks

• Limestone; biostromal, medium grey, weathering to brownish grey and yellowish grey, massive, hard, in part vuggy, mixed finely to 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 188850: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pentamerida - Subrianidae
Conchidium sp. Oehlert 1887
 Pentamerida - Pentameridae
 Atrypida - Lissatrypidae
"? Atrypella sp." = Atrypoidea
"? Atrypella sp." = Atrypoidea Mitchell and Dun 1920
 Favositida - Pachyporidae
Striatopora cf. flexuosa Hall 1852 tabulate coral
 Stauriida - Pycnostylidae
? Synaptophyllum sp. Simpson 1900 horn coral
 Stauriida - Amplexidae
Amplexus sp. Sowerby 1814 horn coral