Antcosti Island, Cap MacGilvray, Gun River Formation (Silurian of Canada)

Where: Québec, Canada (47.1° N, 64.0° W: paleocoordinates 36.9° S, 34.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Gun River Formation (Anticosti Group), Alexandrian (443.4 - 436.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: gray lime mudstone and gray, argillaceous lime mudstone

• Environmental call by T. Hanson.
• "[L]ight brown weathered, thin evenly dedded, blocky lime mudstone grading upward into thin- to thick-bedded lime mudstone, wackestone, grainstone and rare intrarudstone (intraformational conglomerate); thicker beds are usually lenticular. . . thick-to-thin-bedded to platy, brown to blue-grey . . . lime mudstone to skeletal grainstone with varying amounts of intrarudstone, and interbeds of dense lime mudstone; abundant argillaceous material ranges from partings to beds of blue-grey shale, 8 m thick."

Size class: macrofossils

Collection methods: Favostid and rugose corals included in collection.

Primary reference: C. R. Barnes, A. A. Petryk, and T. E. Bolton. 1981. Anticosti Island, Québec. In P. J. Lespérance (ed.), Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group Guidebook 1:1-24 [S. Holland/T. Hanson/S. Bruning]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24403: authorized by Steven Holland, entered by Tori Hanson on 06.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
"Atrypid" sp.
"Atrypid" sp.
Atrypid brachiopods
Strophomenata
 Strophomenida - Leptostrophiidae
Brachyprion sp.
Brachyprion sp. Shaler 1865
Rhynchonellata
 Orthida - Dalmanellidae
Resserella sp.
Resserella sp. Bancroft 1928
 Athyridida - Hyattidinidae
Hyattidina junea