Silliman's Fossil Mount Nautiloids (Ordovician of Canada)

Where: Nunavut, Canada (63.7° N, 69.0° W: paleocoordinates 8.7° S, 37.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Richmondian (449.6 - 445.5 Ma)

Environment/lithology: shallow subtidal; dolomitic limestone and carbonaceous shale

• Warm shallow water.
• "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

Preservation: mold/impression

Primary reference: A. K. Miller, W. Youngquist, and C. Collinson. 1954. Ordovician cephalopod fauna of Baffin Island. Geological Society of America Memoir 62:1-234 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24124: authorized by Steven Holland, entered by Tori Hanson on 31.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
? Leuorthoceras baffinense
Cephalopoda
 Pseudorthocerida - Spyroceratidae
Spyroceras baffinense
Spyroceras baffinense Schuchert 1900
 Endocerida - Endoceratidae
Endoceras gouldi n. sp., Endoceras spp., Endoceras baffinense, Cyclendoceras spp.
Endoceras spp. Hall 1847
Endoceras baffinense Foerste 1928
Cyclendoceras spp. Grabau and Shimer 1910
 Multiceratoidea - Apsidoceratidae
Wilsonoceras squawcreekense, Charactoceras schucherti
 Discosorida - Cyrtogomphoceratidae
Cyrtogomphoceras baffinense, Cyrtogomphoceras furnishi, Cyrtogomphoceras milleri, Cyrtogomphoceras sp.
Cyrtogomphoceras sp. Foerste 1924
 Discosorida - Westonoceratidae
? Westonoceras cf. breviposticum, Westonoceras gouldi, Westonoceras greggi, Westonoceras putnami, Westonoceras thompsoni n. sp., ? Westonoceras tumidum, Westonoceras washburni n. sp., Westonoceras wilsonae n. sp., ? Westonoceras spp., ? Westonoceras baffinense, ? Westonoceras cornulum, Winnipegoceras royi n. sp., Winnipegoceras humei n. sp., Winnipegoceras sp., ? Winnipegoceras sp., Winnipegoceras aff. laticurvatum
? Westonoceras spp. Foerste 1924
? Westonoceras baffinense Schuchert 1900
? Westonoceras cornulum Schuchert 1900
Winnipegoceras sp. Foerste 1928
? Winnipegoceras sp. Foerste 1928
 Tarphycerida - Trocholitidae
Discoceras aff. canadense, ? Discoceras sp.
? Discoceras sp. Barrande 1867
 Multiceratoidea - Clinoceratidae
Whitfieldoceras baffinense
 Ascocerida - Probillingsitidae
Probillingsites belli n. sp., Probillingsites sp.
Probillingsites sp. Foerste 1928
 Oncocerida - Oncoceratidae
Cyrtorizoceras arcticum
 Oncocerida - Diestoceratidae
Diestoceras schucherti
 Orthocerida - Proteoceratidae
Ephippiorthoceras baffinense, Ephippiorthoceras compressum, ? Ephippiorthoceras sp., Ephippiorthoceras dowlingi
Ephippiorthoceras dowlingi Foerste and Savage 1927
 Orthocerida - Kionoceratidae
Kionoceras scalariforme
 Orthocerida - Tripteroceratidae
Tripteroceras boreale n. sp., Allumettoceras subequilaterale, Allumettoceras sp.
Allumettoceras sp. Foerste 1926
 Actinocerida - Ormoceratidae
? Ormoceras spp.
? Ormoceras spp. Stokes 1840
 Actinocerida - Actinoceratidae
Kochoceras cuneiforme, Paractinoceras canadense, ? Paractinoceras sp., Actinoceras cf. clarkei, ? Actinoceras sp.
Kochoceras cuneiforme Troedsson 1926
Actinoceras cf. clarkei
Actinoceras ruedemanni clarkei
? Actinoceras sp. Bronn 1837
 Actinocerida - Gonioceratidae
Lambeoceras baffinense n. sp.
Lambeoceras baffinense n. sp. Miller et al. 1954