Sunblood Mountain Calyptaulax-Ceraurinella Biofacies (A-110): Chazyan, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Rostricellula sp.
Ulrich and Cooper 1942
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unclassified
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Onychoplesia sp.
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Rhynchonellata
- Orthida
- Glyptorthidae
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Glyptorthis sp.
Foerste 1914
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Chaulistomella sp.
Cooper 1956
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Rhynchonellata
- Orthida
- Plectorthidae
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Mimella sp.
Cooper 1930
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Strophomenata
- Strophomenida
- Rafinesquinidae
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? Macrocoelia sp.
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Trilobita
- Lichida
- Lichidae
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Hemiarges turneri
Chatterton and Ludvigsen 1976
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19 individuals | |||||||||
= Hemiarges turneri
Chatterton and Ludvigsen 1976
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Rudkin et al. 1994 | |||||||||
subspecies turneri | ||||||||||
Amphilichas aff. aspratilis
(Bradley 1930)
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3 individuals | |||||||||
Trilobita
- Harpetida
- Harpetidae
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Dolichoharpes aff. reticulata
Whittington 1949
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29 individuals | |||||||||
Trilobita
- Proetida
- Telephinidae
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Carrickia pinguimitra
Chatterton and Ludvigsen 1976
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16 individuals | |||||||||
Trilobita
- Corynexochida
- Styginidae
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Failleana calva
Chatterton and Ludvigsen 1976
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20 individuals | |||||||||
Trilobita
- Corynexochida
- Illaenidae
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Nanillaenus aduncus
Chatterton and Ludvigsen 1976
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7 individuals | |||||||||
Nanillaenus mackenziensis
Chatterton and Ludvigsen 1976
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130 individuals | |||||||||
Bumastus (Bumastoides) lenzi
Chatterton and Ludvigsen 1976
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17 individuals | |||||||||
Trilobita
- Asaphida
- Remopleurididae
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Remopleurides pattersoni
Chatterton and Ludvigsen 1976
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78 individuals | |||||||||
Trilobita
- Asaphida
- Asaphidae
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Isotelus parvirugosus
Chatterton and Ludvigsen 1976
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30 individuals | |||||||||
Trilobita
- Phacopida
- Pterygometopidae
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Calyptaulax callirachis
(Cooper 1953)
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266 individuals | |||||||||
Trilobita
- Phacopida
- Encrinuridae
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Encrinuroides rarus
(Walcott 1877)
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5 individuals | |||||||||
= Walencrinuroides rolfi
Moss and Westrop 2014
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Moss and Westrop 2014 | |||||||||
Cybeloides cimelia
Chatterton and Ludvigsen 1976
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80 individuals | |||||||||
Trilobita
- Phacopida
- Cheiruridae
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Acanthoparypha echinoderma
Chatterton and Ludvigsen 1976
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1 individual | |||||||||
Acanthoparypha evitti
Chatterton and Ludvigsen 1976
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11 individuals | |||||||||
Sphaerexochus arenosus
Chatterton and Ludvigsen 1976
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36 individuals | |||||||||
Ceraurinella kingstoni
Chatterton and Ludvigsen 1976
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3 individuals | |||||||||
Ceraurinella nahanniensis
Chatterton and Ludvigsen 1976
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134 individuals | |||||||||
Heliomeroides teres
Evitt 1951
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1 individual | |||||||||
= Heliomeroides freschaufae
Chatterton 1980
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Chatterton 1980 | |||||||||
Sphaerocoryphe ludvigseni n. sp.
Chatterton 1980
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Chatterton 1980 | |||||||||
Holia secristi
Whittington and Evitt 1953
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6 individuals | |||||||||
= Holia glabra n. sp.
Adrain 1998
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Adrain 1998 | |||||||||
Trilobita
- Odontopleurida
- Odontopleuridae
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Apianurus parabarbatus
Chatterton and Ludvigsen 1976
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15 individuals | |||||||||
Ceratocephala triacantheis
Whittington and Evitt 1953
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38 individuals | |||||||||
see common names |
Geography
Country: | Canada | State/province: | Northwest Territories | County: | District of Mackenzie |
Coordinates: | 61.6° North, 125.8° West (view map) | ||||
Paleocoordinates: | 5.5° North, 59.9° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | outcrop |
Time
Period: | Ordovician | ||
10 m.y. bin: | Ordovician 2-4 | ||
*Period: | Middle Ordovician | *Local age/stage: | Chazyan |
Key time interval: | Chazyan | ||
Age range of interval: | 470 - 457 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Esbataottine | ||
Local section: | Section A | Local bed: | 110 ft |
Local order: | bottom to top | ||
Stratigraphic resolution: | formation |
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,microfossils |
Collection methods and comments
Collection excludes: | all microfossils |
Collection methods: | field collection |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: Also includes ostracods. |
Metadata
Also known as: | A 110 | ||
Database number: | 25932 | ||
Authorizer: | S. Holland, P. Wagner, M. Hopkins | Enterer: | T. Hanson, P. Wagner, M. Hopkins |
Modifier: | M. Hopkins | Research group: | marine invertebrate |
Created: | 2002-09-28 18:56:08 | Last modified: | 2011-01-12 14:49:35 |
Access level: | the public | Released: | 2002-09-28 18:56:08 |
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:
23766 | J. M. Adrain. 1998. Systematics of the Acanthoparyphinae (Trilobita), with Species from the Silurian of Arctic Canada. Journal of Paleontology 72(4):698-718 [P. Wagner/P. Wagner] | |
35465 | B. D. E. Chatterton. 1980. Ontogenetic studies of Middle Ordovician trilobites from the Esbataottine Formation, Mackenzie Mountains, Canada. Palaeontographica Abteilung A 171:1-74 [M. Hopkins/M. Hopkins] | |
53464 | D. K. Moss and S. R. Westrop. 2014. Systematics of some Late Ordovician encrinurine trilobites from Laurentian North America. Journal of Paleontology 88(6):1095-1119 [P. Wagner/P. Wagner] | |
63309 | D. M. Rudkin, R. P. Tripp, and R. Ludvigsen. 1994. The Ordovician trilobite genus Hemiarges (Lichidae: Trochurinae) from North American and Greenland. New York State Museum Bulletin 481:289-306 [M. Hopkins/M. Hopkins] |