MacDonald River Section Unit 10 166-174 ft (Ordovician of Canada)

Where: Quebec, Canada (49.7° N, 63.0° W: paleocoordinates 23.1° S, 38.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hercochitina crickmayi other zone, Homard Member (Vauréal Formation), Richmondian (449.5 - 443.7 Ma)

• Given as Vaureal Zone 1.

• group of beds-level stratigraphic resolution

Environment/lithology: nodular, gray shale and gray limestone

• nodular grey shale and drab and grey limestone, some of which is composed of shell fragments

Size classes: macrofossils, mesofossils

Reposited in the GSC

Primary reference: W. H. Twenhofel. 1928. Geology of Anticosti Island. Geological Survey of Canada Memoir 154(2132):1-351 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 173873: authorized by Pete Wagner, entered by Pete Wagner on 20.10.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Asaphidae
Isotelus gigas Dekay 1824 trilobite
 Strophomenida - Plectambonitidae
Plectambonites sericeus Sowerby 1839
Plectambonites sericeus glaber
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
Zygospira recurvirostris aequivaluis
 Orthida - Dalmanellidae
Onniella tricapitata Jin and Zhan 2008