Portage Chute Formation, Member 1 (North Knife River Exposure) (Ordovician to of Canada)

Where: Manitoba, Canada (58.5° N, 95.0° W: paleocoordinates 7.4° S, 52.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: 1 Member (Portage Chute Formation), Edenian to Edenian (451.0 - 445.5 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; calcareous sandstone

• Environmental call by T. Hanson
• Sandstone, calcareous sandstone, and minor amounts of conglomerate. Fossiliferous in the western area of the outcrop

Primary reference: S. J. Nelson. 1963. Ordovician paleontology of the Northern Hudson Bay lowland. Geological Society of America Memoir 90:1-152 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13657: authorized by Steven Holland, entered by Tori Hanson on 16.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chlorophyceae
  - Receptaculitidae
Receptaculites sp.
Receptaculites sp. Defrance 1827
Rhynchonellata
 Orthida - Platyorthidae
Diceromyonia sp.
Diceromyonia sp. Wang 1949
Cephalopoda
 Actinocerida - Actinoceratidae
Kochoceras sp.
Kochoceras sp. Troedsson 1926
 Actinocerida - Gonioceratidae
Lambeoceras kronlundi
Gastropoda
 Euomphalina - Macluritidae
"Maclurites manitobensis" = Maclurina manitobensis
"Maclurites manitobensis" = Maclurina manitobensis Whiteaves 1890 snail
 Murchisoniina - Trochonematidae
Trochonema coxi
Trochonema coxi Wilson 1938 snail
 Murchisoniina - Subulitidae
Fusispira gigantea
Fusispira gigantea Wilson 1938 snail
Anthozoa
 Stauriida - Stauriidae
Palaeophyllum halysitoides, Favistella alveolata
 Stauriida - Streptelasmatidae
Grewingkia robusta
Grewingkia robusta Whiteaves 1896 horn coral
 Sarcinulida - Syringophyllidae
Calapoecia arctica
Calapoecia arctica tabulate coral
Calapoecia arctica Troedsson(?)
 Lichenariida - Lyoporidae
? Nyctopora foerstei, Nyctopora mackenziei n. sp.
? Nyctopora foerstei tabulate coral
Nyctopora mackenziei n. sp. tabulate coral
 Heliolitida - Plasmoporidae
Plasmopora lambei
Plasmopora lambei tabulate coral
 Heliolitida - Halysitidae
Catenipora aequabilis, Catenipora agglomeratiformis
Catenipora aequabilis Teichert 1937 tabulate coral
Catenipora agglomeratiformis Hall 1900 tabulate coral