Where: Northwest Territories, Canada (74.7° N, 93.5° W: paleocoordinates 1.9° N, 32.0° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: C Member (Read Bay Formation), Ludlow (427.4 - 423.0 Ma)
• unit is 20 feet thick at approximately 500 feet above base of member
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified reef rocks
Size class: macrofossils
Preservation: cast, replaced with silica
Collected by R. Thorsteinsson in 1950-53; reposited in the GSC
Collection methods: surface (in situ), chemical,
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: biostratigraphic analysis
PaleoDB collection 188900: authorized by Melanie Hopkins, entered by Melanie Hopkins on 20.09.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
| Crinoidea | |
|
Crinoidea indet. Miller 1821 Sea lily | |
| Brachiopoda | |
|
Brachiopoda indet. lamp shell | |
| Trilobita | |
"Hemiarges aquilonius n. sp." = Richterarges aquilonius
"Hemiarges aquilonius n. sp." = Richterarges aquilonius Whittington 1961 trilobite | |
| Anthozoa | |
|
? Cystiphyllum sp. Lonsdale 1839 horn coral | |
|
Amplexus cf. propinquus horn coral | |
|
? Streptelasma sp. Hall 1847 horn coral | |
|
Acervularia cf. austini horn coral | |
|
Favosites cf. multispinosus tabulate coral
Favosites aff. forbesi tabulate coral
Favosites aff. niagarensis tabulate coral
Favosites sp. Lamarck 1816 tabulate coral | |
|
? Striatopora sp. Hall 1851 tabulate coral | |
| Stromatoporoidea | |
|
Stromatoporoidea indet. Nicholson and Murie 1878 stromatoporoid sponge | |