GSC loc. C-3217. Lowther Island: Late Emsian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Conodonta
- Ozarkodinida
- Polygnathidae
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Polygnathus perbonus
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Ostracoda
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Ostracoda indet.
Latreille 1802
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unclassified
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Hyolitha indet.
Marek 1963
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Tentaculitida
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Tentaculitida indet.
Ljaschenko 1955
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Rhynchonellata
- Orthida
- Schizophoriidae
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Schizophoria sp.
King 1850
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9 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Hebetoechiidae
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Cassidirostrum radiatum n. sp.
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16 specimens | |||||||||
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Ancillotoechia rex
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68 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Elythynidae
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Elythyna kingi n. sp.
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105 specimens | |||||||||
Rhynchonellata
- Spiriferida
- Ambocoeliidae
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Crurithyris sp.
George 1931
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29 specimens | |||||||||
Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa informal sp. C
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15 specimens | |||||||||
Rhynchonellata
- Athyridida
- Athyrididae
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? Leptathyris sp.
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1 specimen | |||||||||
Rhynchonellata
- Athyridida
- Anoplothecidae
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Bifida sp.
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3 specimens | |||||||||
Rhynchonellata
- Pentamerida
- Gypidulidae
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? Gypidula sp.
Hall 1867
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1 specimen | |||||||||
Strophomenata
- Strophomenida
- Stropheodontidae
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Stropheodontidae indet.
Caster 1939
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3 specimens | |||||||||
Strophomenata
- Strophomenida
- Chonetidae
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"Chonetes" informal sp. A
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1 specimen | |||||||||
"Chonetes" informal sp. B
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9 specimens | |||||||||
"Chonetes" informal sp. C
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49 specimens | |||||||||
Strophomenata
- Orthotetida
- Schuchertellidae
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"Schuchertella" sp.
Girty 1904
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2 specimens | |||||||||
"S."? sp. | ||||||||||
Bivalvia
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Pelecypoda indet.
Goldfuss 1820
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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Gastropoda
- Murchisoniina
- Gosseletinidae
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Angyomphalus (Eoangyomphalus) arctica n. sp.
Blodgett and Johnson 1992
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Blodgett and Johnson 1992 | 22 specimens | ||||||||
Gastropoda
- Bellerophontida
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Bellerophontacea indet.
M'Coy 1851
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Tentaculita
- Styliolinida
- Styliolinidae
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Styliolina sp.
Karpinsky 1884
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see common names |
Geography
Country: | Canada | State/province: | Nunavut | County: | Lowther Island |
Coordinates: | 74.6° North, 97.6° West (view map) | ||||
Paleocoordinates: | 0.3° North, 52.4° West (Wright 2013) | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | outcrop |
Time
Period: | Devonian | Epoch: | Early Devonian |
Stage: | Emsian | 10 m.y. bin: | Devonian 2 | *Local age/stage: | Late/Upper Emsian |
Key time interval: | Late Emsian | Conodont zone: | Polygnathus inversus |
Age range of interval: | 398.3 - 393.3 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Disappointment Bay | Member: | Middle | ||
Regional section: | Member | Regional bed: | 125 ft | ||
Regional order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Three collections, C2681, C2682, and C3217, are in increasing stratigraphic order, the first from the lowest of three members, the second two from the middle member. C3217 seen as correlative with Elythyna beds of Nevada and conodont zone 9 of Klapper et al. 1971. |
Lithology and environment
Primary lithology: | dolomite | ||
Lithology description: Formation as a whole: "basal conglomerate, fine grained sandstone, and predominantly limestone and dolomite." "The lower member is a dark limestone 125 feet thick...The middle member is 325 feet thick and consists of a light-colored dolomite including reef knolls developed at its base...The upper member consists of anhydrite, sandstone, siltstone, and dolomite and has not yielded fossils." | |||
Environment: | open shallow subtidal | Tectonic setting: | cratonic basin |
Geology comments: SEP environmental call based on given info |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | GSC |
Taxonomic list comments:Focus here is on brachiopods. Some other elements mentioned in passing. |
Metadata
Database number: | 26625 | ||
Authorizer: | M. Foote, P. Wagner | Enterer: | M. Foote, P. Wagner |
Modifier: | M. Uhen | Research group: | marine invertebrate |
Created: | 2002-10-18 14:37:36 | Last modified: | 2017-05-18 17:00:33 |
Access level: | the public | Released: | 2002-10-18 14:37:36 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7309. | J. G. Johnson. 1975. Late Early Devonian brachiopods from the Disappointment Bay Formation, Lowther Island, Arctic Canada. Journal of Paleontology 49(6):947-978 [M. Foote/M. Foote/M. Foote] |
Secondary references:
255 | R. B. Blodgett and J. G. Johnson. 1992. Early Middle Devonian (Eifelian) Gastropods of Central Nevada. Palaeontographica Abteilung A 222:85-139 [P. Wagner/P. Wagner/P. Wagner] |