District of Mackenzie, Esbataottine Mountain (P-1575): Chazyan, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Ostracoda
- Palaeocopida
- Leperditellidae
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Leperditella mundula
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Copeland 1974 | ||||||
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Ostracoda
- Hollinocopida
- Oepikellidae
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Oepikella cf. labrosa
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Copeland 1974 | ||||||
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Ostracoda
- Hollinocopida
- Eurychilinidae
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Eurychilina sp.
Ulrich 1889
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Copeland 1974 | ||||||
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Trilobita
- Odontopleurida
- Odontopleuridae
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Apianurus parabarbatus
Chatterton and Ludvigsen 1976
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1 individual | ||||||
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Trilobita
- Asaphida
- Asaphidae
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Isotelus parvirugosus
Chatterton and Ludvigsen 1976
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5 individuals | ||||||
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Trilobita
- Corynexochida
- Illaenidae
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Nanillaenus mackenziensis
Chatterton and Ludvigsen 1976
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8 individuals | ||||||
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Trilobita
- Phacopida
- Cheiruridae
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Ceraurinella nahanniensis
Chatterton and Ludvigsen 1976
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9(?) individuals | ||||||
| see common names | |||||||
Geography
| Country: | Canada | State/province: | Northwest Territories | County: | District of Mackenzie |
| Coordinates: | 61.7° North, 125.9° West (view map) | ||||
| Paleocoordinates: | 5.6° North, 59.9° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | ||
| 10 m.y. bin: | Ordovician 2-4 | ||
| *Period: | Middle Ordovician | *Local age/stage: | Chazyan - Blackriveran |
| Key time interval: | Chazyan | ||
| Age range of interval: | 470.00000 - 457.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Esbataottine | ||
| Local section: | Section P | Local bed: | 1575 ft |
| Local order: | bottom to top | ||
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | argillaceous,silty "limestone" |
| Includes fossils? | Y |
| Lithology description: "[H]omogeneous sequence of micrites and microbiosparites, commonly silty and argillaceous. The bedding is regular to nodular and generally thin (3-8 cm) to medium (8-20 cm), rarely thickly bedded. Sand-size components are absent and more common biotic contributors to skeletal sands (pelmatozoans, heavy-shelled brachiopods, algae, corals, or stromatoporioids) are rare or absent." | |
| Environment: | deep subtidal indet. |
| Geology comments: "[H]omogeneous, probably soft bottom, carbonate and mud substrate, deposited under quiet water conditions on a wide shelf ranging from the littoral to, possibly, deep sub-littoral zones." | |
Taphonomy
| Modes of preservation: | replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Also known as: | P 1575, GSC loc. no C-26315 | ||
| Database number: | 26060 | ||
| Authorizer: | S. Holland, M. Hopkins | Enterer: | T. Hanson, M. Hopkins |
| Modifier: | M. Hopkins | Research group: | marine invertebrate |
| Created: | 2002-10-01 14:01:14 | Last modified: | 2011-02-08 11:11:56 |
| Access level: | the public | Released: | 2002-10-01 14:01:14 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 7069. | B. D. E. Chatterton and R. Ludvigsen. 1976. Silicified Middle Ordovician trilobites from the South Nahanni River Area, District of Mackenzie, Canada. Palaeontographica Abteilung A 154(1-3):1-106 [S. Holland/T. Hanson/T. Hanson] |
Secondary references:
| 7191 | M. J. Copeland. 1974. Middle Ordovician ostracoda from southwestern District of Mackenzie. Canada Geological Survey Bulletin (244)1-55 [S. Holland/T. Hanson/T. Hanson] |