Portage Chute Formation, Member 2 (Nelson River Exposure): Edenian - Richmondian, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Endocerida - Endoceratidae
? Cyclendoceras kindlei
Cephalopoda - Endocerida - Narthecoceratidae
Narthecoceras crassisiphonatum
Cephalopoda - Ascocerida - Ascoceratidae
Billingsites costulatus
Cephalopoda - Discosorida - Cyrtogomphoceratidae
Cyrtogomphoceras turgidum
Cyrtogomphoceras nutatum
Cyrtogomphoceras thompsoni
Cyrtogomphoceras alcocki n. sp.
Cephalopoda - Discosorida - Westonoceratidae
Westonoceras nelsonense
Winnipegoceras dowlingi
Winnipegoceras nelsonense n. sp.
Winnipegoceras laticurvatum Whiteaves 1897
Gastropoda - Euomphalina - Macluritidae
Maclurites altus Wilson 1931
Maclurites manitobensis (Whiteaves 1890)
recombined as Maclurina manitobensis
Gastropoda - Murchisoniina - Trochonematidae
Trochonema coxi Wilson 1938
Gastropoda - Murchisoniina - Subulitidae
Fusispira gigantea Wilson 1938
Gastropoda - Murchisoniina - Hormotomidae
Hormotoma winnipegensis Whiteaves 1897
Anthozoa - Favositida - Favositidae
? Saffordophyllum portagechutense n. sp.
Anthozoa - Heliolitida - Plasmoporidae
Plasmopora lambei
Plasmopora pattersoni
Anthozoa - Heliolitida - Halysitidae
Catenipora rubra
Catenipora stearni n. sp.
Catenipora robusta (Wilson 1926)
Manipora amicarum
Manipora irregularis
Manipora feildeni
Anthozoa - Stauriida - Streptelasmatidae
Grewingkia robusta Whiteaves 1896
Anthozoa - Stauriida - Stauriidae
Palaeophyllum halysitoides
Chlorophyceae - Receptaculitidae
Receptaculites sp. Defrance 1827
see common names

Geography
Country:Canada State/province:Manitoba
Coordinates: 56.5° North, 94.3° West (view map)
Paleocoordinates:9.1° South, 53.4° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Late/Upper Ordovician
Stage:Katian 10 m.y. bin:Ordovician 5
*Period:Late/Upper Ordovician *Local age/stage:Edenian - Richmondian
Key time interval:Edenian - Richmondian
Age range of interval:451.10000 - 446.00000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Bad Cache Rapids Formation:Portage Chute Member:2
Stratigraphic resolution:member
Lithology and environment
Primary lithology:dolomitic,gray "limestone"
Lithology description: "Gray- to buff-weathering, light-gray, microcrystalline, slightly dolomitic limestone in beds 1 inch to 2 feet thick. Fragmental organic material is common. Closely-spaced, rusty-weathering, anastamosing laminae within the limestone are characteristic and in many places give the member a nodular appearance upon weathering."
Environment:carbonate indet.
Geology comments: Environmental call by T. Hanson
Taphonomy
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:13655
Authorizer:S. Holland Enterer:T. Hanson
Modifier:S. Holland Research group:marine invertebrate
Created:2002-04-16 17:45:06 Last modified:2003-09-01 20:44:49
Access level:the public Released:2002-04-16 17:45:06
Creative Commons license:CC BY
Reference information

Primary reference:
6140. 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]