Becscie-Gun River Contact, Anticosti Island (Silurian of Canada)

Also known as Anticosti Island, Becscie-Gun River Contact, Becscie Formation Member 3

Where: Québec, Canada (49.5° N, 63.6° W)

• Paleocoordinates: 22.1° S, 87.0° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chabot Member (Becscie Formation), Alexandrian (443.4 - 436.0 Ma)

• PJW: given as member 3, which is now Chabot.

• member-level stratigraphic resolution

Environment/lithology: marine; argillaceous, silty lime mudstone and green, calcareous shale

• Environmental call by T. Hanson.
• "22.5 m thick . . . irregularly, thin- to medium lenticular-bedded, argillaceous, silty to sandy siliciclastic lime carbonates of mainly highly skeletal, algal, locally reefal grainstones and packstones, interbedded with highly calcareous and fossiliferous green shale. The commonly current laminated, rudaceous limestones grade locally to siliciclastic sandstone."

Size class: macrofossils

Collection methods: Coral and stromatoporid forms also included.

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 24405: authorized by Steven Holland, entered by Tori Hanson on 06.08.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Cyclorinites gregarius
Anthozoa
 Heliolitida - Halysitidae
Catenipora sp.
Catenipora sp. Lamarck 1816 tabulate coral
 Heliolitida - Proporidae
Propora sp.
Propora sp. Milne-Edwards and Haime 1849 tabulate coral
 Favositida - Favositidae
"Palaeofavosites sp." = Paleofavosites
"Palaeofavosites sp." = Paleofavosites Twenhofel 1914 tabulate coral
Rhynchonellata
 Atrypida -
Zygospiraella planoconvexa
Stenolaemata
 Cryptostomata - Ptilodictyidae
Phaenopora superba