Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 9.1° N, 55.4° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Normalograptus persculptus zone, Whittaker Formation, Hirnantian (445.2 - 443.4 Ma)
• group of beds-level stratigraphic resolution
Environment/lithology: open shallow subtidal; argillaceous limestone and calcareous shale
•SEP environmental call based primarily on PBDB ref. 7215. IF age assignment is correct, then this unit is consistent with the last portion of the HST in the upper-most Ord. and immediately prior to TST of lowermost-Sil. and latest Ord. Shallow assignment based on Bathyurus in ref. 7215.
Preservation: replaced with silica
Primary reference: J. Jin and B. D. E. Chatterton. 1997. Latest Ordovician-Silurian articulate brachiopods and biostratigraphy of the Avalanche Lake area, southwestern District of Mackenzie, Canada. Palaeontographica Canadiana 13:1-62 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 26071: authorized by Michael Foote, entered by Michael Foote on 02.10.2002, edited by Melanie Hopkins and Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Rhynchonellata | |
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"Platystrophia orbiculoidea n. sp." = Gnamptorhynchos orbiculoidea
"Platystrophia orbiculoidea n. sp." = Gnamptorhynchos orbiculoidea Jin and Chatterton 1997 5 sh, 27 vv/dv
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Strophomenata | |
Katastrophomena mackenzii2 Jin and Harper 2024 | |
Trilobita | |
Acanthopyge (Lobopyge) pristina n. sp.1
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