ammonites
Anticosti Island, Ellis Bay Formation, Member 4 Graptolites (Ordovician of Canada)

Where: Québec, Canada (49.0° N, 64.0° W: paleocoordinates 23.6° S, 39.0° W)

• coordinate estimated from map

• local area-level geographic resolution

When: 4 Member (Ellis Bay Formation), Ashgill (449.5 - 443.7 Ma)

• member-level stratigraphic resolution

Environment/lithology: calcareous shale and limestone

• Environmental call by T. Hanson.
• Shale, calcareous with limestone interbeds, and limestone with shale partings, some with ripple marks. Lithology from A. D. McCracken and C. R. Barnes. 1981. Conodont biostratigraphy across the Ordovician-Silurian boundary, Ellis Bay Formation, Anticosti Island, Québec. Field meeting, Anticosti-Gaspé, Québec, 1981: IUGS Subcommssion on Silurian Stratigraphy, Ordovician-Silurian Boundary Working Group, Stratigraphy and Paleontology 2:61-69.

Size classes: macrofossils, mesofossils

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 24761: authorized by Steven Holland, entered by Tori Hanson on 19.08.2002