GSC 95231. Goodsir Creek, Cornwallis Island (Silurian of Canada)

Where: Nunavut, Canada (75.3° N, 95.0° W: paleocoordinates 0.7° N, 29.9° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Polygnathoides siluricus conodont zone, A Member (Read Bay Formation), Ludfordian (425.6 - 423.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; green mudstone and wackestone

• The occurrence of numerous corals and pelmatozoans suggests a subtidal environment.
• Most of the trilobite specimens (from GSC localities 95229-32, 95234-35) occurred in richly fossiliferous limestones, predominantly mudstones and wackestones. Traction current structures are very rare in these units.

Size classes: macrofossils, mesofossils

Primary reference: A. Thomas and G. Narbonne. 1979. Silurian trilobites from arctic Canada. Geological Magazine 116(1):1-19 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 229371: authorized by Pete Wagner, entered by Pete Wagner on 06.03.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Proetida - Otarionidae
Cyphaspis sp.
Cyphaspis sp. Burmeister 1843 trilobite
 Proetida - Proetidae
Helokybe spio n. gen. n. sp.
Helokybe spio n. gen. n. sp. Thomas and Narbonne 1979 trilobite
 Lichida - Lichidae
"Hemiarges aff. aquilonius" = Richterarges aquilonius
"Hemiarges aff. aquilonius" = Richterarges aquilonius Whittington 1961 trilobite
 Phacopida - Encrinuridae
Encrinurus hyperboreus
Encrinurus hyperboreus Thomas and Narbonne 1979 trilobite