Anticosti Island, Jupiter Formation Member 4 Graptolites (Silurian of Canada)

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: 4 Member (Jupiter Formation), Alexandrian (443.4 - 436.0 Ma)

• member-level stratigraphic resolution

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

• Envrionmental call by T. Hanson.
• "The lower 4 m consist of thin- to medium-bedded, grey to brown-grey, argillaceous to marly lime mudstone to rare skeletal wackestone and packstone; gradational partings and beds of shale up to 5 cm thick separate the limestones which have irregular surfaces, some horizontally burrowed. . . . thin- to locally medium-, tabular, subnodular to lensy-bedded, grey- to brown-grey, lime mudstone to rare skeletal wackestone and packstone that weather grey-yellow to buff; partings and beds of shale up to 5 cm thick and commonly burrowed are interbeddd with the limestone." Lithology from C. R. Barnes, A. A. Petryk and T. E. Bolton. 1981. Anticosti Island, Québec. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group Guidebook 1:1-24. Edited by P. J. Lespérance.

Size classes: macrofossils, mesofossils

Collection methods: Graptolites only; from Petryk's collections made from 1975-1977 and 1979. Individual collections described in reference.

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 24825: authorized by Steven Holland, entered by Tori Hanson on 20.08.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

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