Portage Chute Formation, Member 2 (South Knife River Exposure): Edenian - Richmondian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chlorophyceae
- Receptaculitidae
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Receptaculites sp.
Defrance 1827
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Cephalopoda
- Actinocerida
- Gonioceratidae
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Lambeoceras landerense
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Lambeoceras baffinense
Miller et al. 1954
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Cephalopoda
- Oncocerida
- Oncoceratidae
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Digenuoceras latum
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Cephalopoda
- Discosorida
- Cyrtogomphoceratidae
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Cyrtogomphoceras turgidum
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Cyrtogomphoceras rotundum
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Cyrtogomphoceras foerstei
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Cephalopoda
- Discosorida
- Westonoceratidae
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Winnipegoceras dowlingi
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Winnipegoceras laticurvatum
Whiteaves 1897
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Westonoceras nelsonense
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Cephalopoda
- Apsidoceratidae
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Charactoceras manitobense n. sp.
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Cephalopoda
- Clinoceratidae
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Whiteavesites winnipegensis
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Gastropoda
- Euomphalina
- Macluritidae
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Maclurites altus
Wilson 1931
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Maclurites manitobensis
(Whiteaves 1890)
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recombined as Maclurina manitobensis | ||||||||||
Gastropoda
- Euomphalina
- Holopeidae
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Holopea gigantea n. sp.
Nelson 1963
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Gastropoda
- Murchisoniina
- Subulitidae
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Fusispira gigantea
Wilson 1938
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Gastropoda
- Murchisoniina
- Trochonematidae
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Trochonema coxi
Wilson 1938
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Gastropoda
- Murchisoniina
- Hormotomidae
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Hormotoma winnipegensis
Whiteaves 1897
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Rhynchonellata
- Orthida
- Platyorthidae
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Diceromyonia sp.
Wang 1949
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Thaerodonta sp.
Wang 1949
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synonym of Eochonetes | ||||||||||
Anthozoa
- Stauriida
- Streptelasmatidae
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Grewingkia robusta
Whiteaves 1896
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Anthozoa
- Stauriida
- Stauriidae
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Palaeophyllum stokesi
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Anthozoa
- Heliolitida
- Plasmoporidae
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Plasmopora lambei
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Anthozoa
- Heliolitida
- Halysitidae
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Catenipora aequabilis
(Teichert 1937)
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Catenipora robusta
(Wilson 1926)
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Catenipora agglomeratiformis
(Hall 1900)
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Manipora amicarum
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Manipora feildeni
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Anthozoa
- Favositida
- Favositidae
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? Saffordophyllum portagechutense n. sp.
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Anthozoa
- Sarcinulida
- Syringophyllidae
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Calapoecia arctica
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Calapoecia arctica Troedsson(?) | ||||||||||
see common names |
Geography
Country: | Canada | State/province: | Manitoba |
Coordinates: | 58.5° North, 95.0° West (view map) | ||
Paleocoordinates: | 7.4° South, 52.2° 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" |
Includes fossils? | Y |
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
Collection methods and comments
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 13656 | ||
Authorizer: | S. Holland | Enterer: | T. Hanson |
Modifier: | S. Holland | Research group: | marine invertebrate |
Created: | 2002-04-16 18:06:31 | Last modified: | 2003-09-01 20:45:45 |
Access level: | the public | Released: | 2002-04-16 18:06:31 |
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] |