Western Prince of Wales Island, Section 8, Unit 5B, GSC loc. C26883: Lochkovian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Peleksygnathus sp.
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Conodonta
- Ozarkodinida
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Ozarkodina remscheidensis
Ziegler 1960
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recombined as Nicollidina remscheidensis | |||||||
Strophomenata
- Strophomenida
- Amphistrophiidae
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? Mesodouvillina sp.
Williams 1950
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Strophomenata
- Strophomenida
- Douvillinidae
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? Cymostrophia sp.
Caster 1939
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Rhynchonellata
- Pentamerida
- Gypidulidae
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Plicogypa thorsteinssoni
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Rhynchonellata
- Orthida
- Dalmanellidae
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Protocortezorthis carinatus n. sp.
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Rhynchonellata
- Orthida
- Schizophoriidae
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Schizophoria sp.
King 1850
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Rhynchonellata
- Spiriferida
- Reticulariidae
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Undispirifer laeviplicatus
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Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa sp.
Dalman 1828
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Rhynchonellata
- Protorthida
- Skenidiidae
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Skenidioides sp.
Schuchert and Cooper 1931
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Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Ancillotoechia sp.
Havlicek 1959
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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Linguopugnoides uyenoi n. sp.
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see common names |
Geography
Country: | Canada | State/province: | Nunavut |
Coordinates: | 73.5° North, 100.0° West (view map) | ||
Paleocoordinates: | 2.2° South, 30.2° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | outcrop |
Time
Period: | Devonian | Epoch: | Early/Lower Devonian |
Stage: | Lochkovian | 10 m.y. bin: | Devonian 1 |
*International age/stage: | Lochkovian - Late/Upper Lochkovian | ||
Key time interval: | Lochkovian | ||
Age range of interval: | 419.20000 - 410.80000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Unnamed formation. "The age of this section is in part, at least, late Lochkovian." Brachipods correlative with Quadrithyris Zone. Conodont fauna 3 of Klapper. |
Lithology and environment
Primary lithology: | gray argillaceous lime mudstone | ||
Lithology description: Section in general: "Section 8 contains varied and complex lithologies. The basal beds are highly argillaceous, thin bedded, fossiliferous lime mudstone. These exhibit channeling within thin to med. bedded, well cemmented calcareous siltstones which contain angular quartz. The siltstones are devoid of megafauna except for a few beds that contain fare diarticulated brachiopods and poorly preserved fish remains. These channels may have been formed on shallow-subtidal areas. Higher upsection, these two units are interbedded in places, and in others the argillaceous lime-mudstone units are channel infillings within the...siltstone...etc. etc." This unit: "argillaceous lime mudstone-wackestone: thin bedded, undulatory, lumpy; med. grey...common grey-green argillaceous seams; very fossiliferous..." | |||
Environment: | lagoonal/restricted shallow subtidal | Tectonic setting: | passive margin |
Geology comments: Deposits in this region are of two general kinds: shallow-water stable carbonate platform (generally in the NW part of Arctic Archipelago) and deeper basinal facies (generally to the SE). This collection is in the former. This is in Smith's Plicogypa-Atrypa Community. "Common notable additional memebers of the fauna are fish, gastropods, and pelecypods. Rare constituents are ostracodes and solitary corals...Notable here is the absence of echinoderm fragments, colonial corals, calcareous algae, or bryozoa which are generally associated with brachiopods of this type. The community is found in very highly argillaceous silty, thin-bedded lime-mudstone. It thrived in a quiet, possibly pretected-water environment as shown by the lack of organisms commonly associated with the normal marine fauans. Most of the brachiopod taxa are of the type that did not possess a functional pedicle and presumably lived unattached on the soft muds of the sea bottom." "This complex section represents a broad shallowing-trend with minor reversals from its basal beds which were deposited in a quiet-water, subtidal environemnt. The topmost beds were deposited in a high energy, shallow environment, as indicated by the presence of fragments of colonial corals and stromatoporoids."
SEP environmental call based on given info and regional context |
Taphonomy
Collection methods and comments
Reason for describing collection: | biostratigraphic analysis |
Museum repositories: | GSC |
Collection method comments: Smith gives specimen counts. | |
Taxonomic list comments:Focus of the entire monograph is on brachiopods. Other taxa mentioned but not necessarily listed in detail. |
Metadata
Also known as: | Plicogypa-Atrypa Community | ||
Database number: | 26493 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | M. Foote | Research group: | marine invertebrate |
Created: | 2002-10-16 08:29:38 | Last modified: | 2006-09-15 15:13:14 |
Access level: | the public | Released: | 2002-10-16 08:29:38 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7273. | R. E. Smith. 1980. Lower Devonian (Lochkovian) biostratigraphy and brachiopod faunas, Canadian arctic islands. Geological Survey of Canada Bulletin 308:1-155 [M. Foote/M. Foote/P. Wagner] |