MacDonald River Section Unit 08 134-146 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 normalis other zone, Homard Member (Vauréal Formation), Richmondian (449.5 - 443.7 Ma)

• Given as English Head Zone 5.

•The limestone beds range in thickness from 2 inches to 1 foot. Seaweed impressions are extremely common on some of the limestone beds. The "track bed" is somewhere near the top of this division, as pieces from it were found in the talus slope beneath, but it was not located in place

• group of beds-level stratigraphic resolution

Environment/lithology: blue limestone and gray, blue shale

• Hard, blue limestone separated by thin beds and partings of bluish grey shale.

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 173990: authorized by Pete Wagner, entered by Pete Wagner on 22.10.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Lophophorata
 Tentaculitida - Costatulitidae
"Cornulites richmondensis" = Costatulites richmondensis
"Cornulites richmondensis" = Costatulites richmondensis Miller 1874
Strophomenata
 Strophomenida - Plectambonitidae
Plectambonites sericeus Sowerby 1839
Plectambonites sericeus glaber
 Strophomenida - Furcitellidae
"? Leptaena nitens" = Megamyonia nitens
"? Leptaena nitens" = Megamyonia nitens Billings 1860
Rhynchonellata
 Orthida - Plaesiomyidae
"Dinorthis carletona" = Dinorthis (Pionorthis) carletona
"Dinorthis carletona" = Dinorthis (Pionorthis) carletona Twenhofel 1928
 Orthida - Dalmanellidae
"Dalmanella meeki" = Cincinnetina meeki
"Dalmanella meeki" = Cincinnetina meeki Miller 1875
Stenolaemata
 Cryptostomata - Ptilodictyidae
Ptilodictya flagella Nicholson 1875
 Cryptostomata - Arthrostylidae
Sceptropora facula Ulrich 1888
Trilobita
 Phacopida - Cheiruridae
Ceraurinus icarus Billings 1860 trilobite