Anticosti Island, Becscie Graptolites (Twenhofel Zone 3, 4?) (Silurian of Canada)

Also known as Anticosti Island, Becscie Formation Graptolites (Twenhofel Zone 3, 4?)

Where: Québec, Canada (49.5° N, 63.0° W)

• Paleocoordinates: 22.0° S, 86.6° W (Wright 2013)

• coordinate estimated from map

• local area-level geographic resolution

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

• "Zone" 3, 4? PJW: given as member 3 or 4, which is now Chabot.

• member-level stratigraphic resolution

Environment/lithology: limestone

• Environmental call by T. Hanson.
• Thinly-bedded limestone. Lithology from P. Copper. 1981. Atrypoid brachiopods and their distribution in the Ordovician-Silurian sequence of Anticosti Island. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group, Stratigraphy and Paleontology 2:137-141. Edited by P. J. Lespérance.

Size classes: macrofossils, mesofossils

Collection methods: Graptolites only; names revised from W. H. Twenhofel's 1928 collection.

Primary reference: J. Riva and A. A. Petryk. 1981. Graptolites from the Upper Ordovician and Lower Silurian of Anticosti Island and the position of the Ordovician-Silurian boundary. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group, Stratigraphy and Paleontology 2:159-164 [S. Holland/T. Hanson/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24610: authorized by Steven Holland, entered by Tori Hanson on 11.08.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Normalograptidae
"Climacograptus cf. normalis" = Normalograptus normalis
"Climacograptus cf. normalis" = Normalograptus normalis Lapworth 1877 graptolite
 Graptoloidea - Monograptidae
Monograptus sedgwickii