Where: Northwest Territories, Canada (75.5° N, 96.1° W: paleocoordinates 2.1° N, 39.5° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Thumb Mountain Formation (Cornwallis Group), Chatfieldian to Chatfieldian (453.8 - 449.6 Ma)
• from upper 50 feet of formation; lower than zone B
• group of beds-level stratigraphic resolution
Environment/lithology: marine; lithified lime mudstone
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 188774: authorized by Melanie Hopkins, entered by Melanie Hopkins on 18.09.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Strophomenata | |
Sowerbyella sp. Jones 1928 | |
Rhynchonellata | |
"Parastrophinella cf. hemiplicata" = Parastrophina hemiplicata
| |
? Cyclospira sp. Hall and Clarke 1893 | |
"Resserella cf. sillimani" = Dalmanella sillimani
"Resserella cf. sillimani" = Dalmanella sillimani Roy 1941 | |
? Hesperorthis sp. Schuchert and Cooper 1931 | |
Plectorthis sp. Hall and Clarke 1892 | |
Stenolaemata | |
Rhinidictya sp. Ulrich 1882 | |
Trilobita | |
Calliops cf. narrawayi trilobite |