Section 11A. O-104540. Jordan River (Ordovician to of Canada)

Also known as Section 5A.

Where: Nunavut, Canada (63.7° N, 69.0° W: paleocoordinates 10.9° S, 39.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Climacograptus spiniferus graptolite zone, Unit 1 Member (Amadjuak Formation), Chatfieldian to Chatfieldian (453.8 - 450.2 Ma)

• Belodina confluens zone (Zhang 2017) and Acanthochitina cancellata zone (Asselin, Achab & Soufiane 2000)

• group of beds-level stratigraphic resolution

Environment/lithology: dolomitic limestone and calcareous shale

• Environmental call by T. Hanson.
• "Throughout the Mount, the top 50 feet of these beds consists of massive dolomite limestone, the next 75 feet of thin-bedded limestone and dolomite, and the lower 175 feet of calcareous shale with some interbedded limestone."

Size class: macrofossils

Reposited in the GSC

Primary reference: T. E. Bolton. 2000. Ordovician megafauna, southern Baffin Island, Nunavat. Geological Survey of Canada Bulletin 557:39-158 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 192339: authorized by Pete Wagner, entered by Pete Wagner on 23.03.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Calymenidae
Flexicalymene croneisi Roy 1941 trilobite
 Olenida - Olenidae
Triarthrus (Triarthrus) eatoni Hall 1838 trilobite
Triarthrus (Danarcus) glaber Billings 1859 trilobite
 Asaphida - Asaphidae
"Isotelus cf. iowaensis" = Isotelus iowensis Owen 1852 trilobite
Pseudogygites latimarginatus Hall 1847 trilobite
Cephalopoda
 Oncocerida - Oncoceratidae
 Actinocerida - Gonioceratidae
Lambeoceras baffinense Miller et al. 1954
 Orthocerida - Tripteroceratidae
Gastropoda
 Euomphalina - Macluritidae
Maclurina sp. Ulrich and Scofield 1897 snail
Demospongiae
 Chaetetida - Cryptolichenariidae
Amsassia floweri chaetetid sponge
Chlorophyceae
  - Receptaculitidae