Locality 25, unit 7 (Silurian to of Canada)

Where: Northwest Territories, Canada (74.7° N, 94.2° W: paleocoordinates 3.0° N, 33.4° 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 82.8 feet thick

• group of beds-level stratigraphic resolution

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

• Argillaceous limestone; medium light-grey to medium grey and olive-grey, weathering to brownish grey and greyish yellow, very thin-bedded, flaggy, hard, dense, sublithographic to very finely crystalline, irregular bedding surfaces; numerous shale partings

Size class: macrofossils

Collected by R. Thorsteinisson in 1950-53

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 188841: authorized by Melanie Hopkins, entered by Melanie Hopkins on 19.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Pentamerida - Pentameridae
"Conchidium cf. knighti" = Kirkidium knighti
"Conchidium cf. knighti" = Kirkidium knighti Sowerby 1813
 Actinocerida - Armenoceratidae
 Favositida - Favositidae
Favosites cf. senex tabulate coral
 Stauriida - Streptelasmatidae
? Streptelasma sp. Hall 1847 horn coral