ammonites
Anticosti Island, Jupiter Formation Graptolites (Twenhofel Zone 2) (Silurian to of Canada)

Where: Québec, Canada (49.5° N, 63.0° W: paleocoordinates 22.5° S, 33.6° W)

• coordinate estimated from map

• local area-level geographic resolution

When: 2 Member (Jupiter Formation), Alexandrian to Alexandrian (443.7 - 428.2 Ma)

• "Zone" 2

• member-level stratigraphic resolution

Environment/lithology: shale and limestone

• Environmental call by T. Hanson.
• Alternating shales and limestones. 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 24612: authorized by Steven Holland, entered by Tori Hanson on 11.08.2002