Fauna j, Section AV5, Delorme Fm., Mackenzie Mts.: Whitwellian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita
- Phacopida
- Encrinuridae
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Struszia (Avalanchurus) lennoni n. sp.
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Edgecombe and Chatterton 1993 | |||||||||
Trilobita
- Phacopida
- Calymenidae
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Diacalymene gabrielsi
Siveter and Chatterton 1996
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Calymene polgari
Siveter and Chatterton 1996
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C. (s.l.) | ||||||||||
Trilobita
- Proetida
- Otarionidae
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Otarion huddyi n. sp.
Adrain and Chatterton 1994
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Adrain and Chatterton 1994 | |||||||||
Strophomenata
- Strophomenida
- Strophodontidae
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Brachyprion (Protomegastrophia) sp.
Caster 1939
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Jin and Chatterton 1997 | |||||||||
reassigned as Megastrophia (Protomegastrophia) | ||||||||||
Strophomenata
- Strophomenida
- Sowerbyellidae
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Eoplectodonta (Eoplectodonta) paucicostellata
Jin and Chatterton 1997
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Jin and Chatterton 1997 | |||||||||
Strophomenata
- Strophomenida
- Furcitellidae
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Pentlandina harperi
Zhang 1989
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Jin and Chatterton 1997 | |||||||||
Strophomenata
- Orthotetida
- Chilidiopsidae
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Morinorhynchus crispus
(Lindström 1861)
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Jin and Chatterton 1997 | |||||||||
Strophomena crispa | ||||||||||
Rhynchonellata
- Protorthida
- Skenidiidae
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Skenidioides operosa
Johnson et al. 1976
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Jin and Chatterton 1997 | |||||||||
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Hercotrema pentaforma
(Lenz 1977)
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Jin and Chatterton 1997 | |||||||||
Ancillotoechia pentaforma | ||||||||||
Rhynchonellata
- Orthida
- Dicoelosiidae
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Epitomyonia amplissima
Zhang 1989
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Jin and Chatterton 1997 | |||||||||
Rhynchonellata
- Orthida
- Dalmanellidae
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Isorthis (Arcualla) boreaina
Zhang 1989
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Jin and Chatterton 1997 | |||||||||
Isorthis (Arcualla) microscapha
Johnson et al. 1976
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Jin and Chatterton 1997 | |||||||||
Rhynchonellata
- Atrypida
- Atrypidae
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Atrypa (Gotatrypa) variabilis
Johnson et al. 1976
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Jin and Chatterton 1997 | |||||||||
see common names |
Geography
Country: | Canada | State/province: | Northwest Territories |
Coordinates: | 62.4° North, 127.0° West (view map) | ||
Paleocoordinates: | 4.7° North, 49.3° West | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Silurian | Epoch: | Wenlock |
Stage: | Homerian | 10 m.y. bin: | Silurian 2 | *Epoch: | Early/Lower Wenlock |
Key time interval: | Whitwellian | Zone: | Kockelella patula |
Age range of interval: | 426.20000 - 425.40000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Delorme | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages. I'm assuming AV5 can be correlated as well.) See PBDB ref. 7215. |
Lithology and environment
Primary lithology: | argillaceous "limestone" | ||
Secondary lithology: | "shale" | ||
Lithology description: "...sequence of buff and light brown weathering, thinly bedded limestones, dolomites and shales that overlie the Whittaker Formation and underlie the Camsell Formation...The beds above and including a distinctive buff-brown shale unit in the sections near Avalanche Lake are included in the Delorme Formation in this work, although the lowest buff-brown shaly beds (below distinctive orange coloured limestones and dolomites) could be regarded as transitional between the Road River and Delorme..." (PBDB ref. 7215) | |||
Environment: | slope | Tectonic setting: | passive margin |
Glacial or sequence phase: | highstand systems tract | ||
Geology comments: Grand Cycle 3.
SEP environmental call based primarily on PBDB ref. 7215. |
Taphonomy
Modes of preservation: | replaced with silica |
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 26058 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | P. Wagner | Research group: | marine invertebrate |
Created: | 2002-10-01 13:51:29 | Last modified: | 2007-04-10 16:40:00 |
Access level: | the public | Released: | 2002-10-01 13:51:29 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7217. | D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote] |
Secondary references:
7226 | J. M. Adrain and B. D. E. Chatterton. 1994. The aulacopleurid trilobite Otarion, with new species from the Silurian of northwestern Canada. Journal of Paleontology 68(2):305-323 [M. Foote/M. Foote/M. Foote] | |
7220 | G. D. Edgecombe and B. D. E. Chatterton. 1993. Silurian (Wenlock-Ludlow) encrinurine trilobites from the Mackenzie Mountains, Canada, and related species. Palaeontographica Abteilung A 229(4-6):75-112 [M. Foote/M. Foote/M. Foote] | |
7218 | J. Jin and B. D. E. Chatterton. 1997. Latest Ordovician-Silurian articulate brachiopods and biostratigraphy of the Avalanche Lake area, southwestern District of Mackenzie, Canada. Palaeontographica Canadiana 13:1-62 [M. Foote/M. Foote/M. Foote] |