Section 10. O-104229. Silliman's Fossil Mount, head of Frobisher Bay (Ordovician to of Canada)

Where: Nunavut, Canada (63.8° N, 68.9° W: paleocoordinates 10.8° 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 (460.9 - 449.5 Ma)

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

• group of beds-level stratigraphic resolution

Environment/lithology: brown, gray limestone

• Environmental call by T. Hanson.
• A small subcrop of resistant limestone bed; light brown and orangish brown weathering, brownish grey; coarse calcilutite, thin bedded.

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: general faunal/floral analysis

PaleoDB collection 192776: authorized by Pete Wagner, entered by Pete Wagner on 19.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Chaetetida - Cryptolichenariidae
Amsassia floweri chaetetid sponge
Gastropoda
 Murchisoniina - Subulitidae
"Subulites (Fusispira) sp." = Fusispira
"Subulites (Fusispira) sp." = Fusispira Hall 1872 snail
 Murchisoniina - Hormotomidae
"Seelya ulrlchi" = Plethospira
"Seelya ulrlchi" = Plethospira snail
 Murchisoniina - Trochonematidae
Trochonema (Trochonema) sp. Salter 1859 snail
 Murchisoniina - Lophospiridae
"Loxoplocus (Lophospira) sp." = Lophospira
"Loxoplocus (Lophospira) sp." = Lophospira Whitfield 1886 snail
 Murchisoniina - Eotomariidae
Liospira sp. Ulrich and Scofield 1897 snail
Pseudocryptaenia sp. Koken and Perner 1925 snail
Eotomaria robinsoni Roy 1941 snail
 Bellerophontida - Plectonotidae
Tetranota sp. Ulrich and Scofield 1897 snail
 Bellerophontida - Bucaniidae
Kokenospira cf. costalis Ulrich and Scofield 1897 snail
 Euomphalina - Holopeidae
Holopea arctica Schuchert 1900 snail
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella sp. Jones 1928
 Strophomenida - Rafinesquinidae
 Strophomenida - Strophomenidae
Strophomena "Roy Sp. 1" Rafinesque and De Blainville 1824
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
"? Lepidocyclus arctica" = Hiscobeccus arcticus
"? Lepidocyclus arctica" = Hiscobeccus arcticus Roy 1941
 Orthida - Plaesiomyidae
 Orthida - Hesperorthidae
 Orthida - Dalmanellidae
"Resserella sillimani" = Dalmanella sillimani
"Resserella sillimani" = Dalmanella sillimani Roy 1941
 Atrypida - Cyclospiridae
 Pentamerida - Parastrophinidae
Trilobita
 Phacopida - Cheiruridae
Hapsiceraurus hispidus Whittington 1954 trilobite