ammonites
Anticosti Island, Chicotte River, Jupiter Formation Member 7 Graptolites (Silurian of Canada)

Where: Québec, Canada (49.2° N, 63.1° W: paleocoordinates 21.4° S, 35.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: 7 Member (Jupiter Formation), Alexandrian (443.7 - 436.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: argillaceous lime mudstone and calcareous shale

• Environmental call by T. Hanson.
• "[T]hin- to medium-bedded, brown-grey, argillaceous to marly lime mudstone to local wackestone, weathering grey-yellow, intergrading with highly calcareous shale." 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 24827: authorized by Steven Holland, entered by Tori Hanson on 21.08.2002