Section G. Shipshaw River, near Chicoutami (Ordovician of Canada)

Where: Quebec, Canada (48.7° N, 71.2° W: paleocoordinates 23.3° S, 45.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Amplexograptus manitoulinensis graptolite zone, Pointe-Bleue Shale Formation, Maysvillian (452.0 - 449.5 Ma)

• uppermost G. pygmaeus to A. manitoulinensis Zones; however, appears to be Maysvillian, so only manitoulinensis seems correct.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, brown, gray shale

• Shales; dark brown - gray; fissile; laminated

Size classes: macrofossils, microfossils

Reposited in the GSC

Primary reference: S. Desbiens and P. J. Lespérance. 1989. Stratigraphy of the Ordovician of the Lac Saint-Jean and Chicoutimi outliers, Quebec. Canadian Journal of Earth Sciences 26(6):1185-1202 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184439: authorized by Pete Wagner, entered by Pete Wagner on 26.02.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Olenida - Olenidae
Triarthrus spinosus Billings 1857 trilobite
Triarthrus eatoni Hall 1838 trilobite
Triarthrus glaber Billings 1859 trilobite
Triarthrus rougensis Parks 1921 trilobite
 Diplograptoidea - Diplograptidae
Orthograptus eucharis Hall 1865 diplograptoid