Fauna i, Section AV1, Whittaker Fm., Mackenzie Mts.: Llandovery - Wenlock, Canada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Hesperorthidae
Jin and Chatterton 1997
Rhynchonellata - Spiriferida - Reticulariidae
Jin and Chatterton 1997
Rhynchonellata - Pentamerida - Gypidulidae
Caryogyps grayi Zhang 1989
Jin and Chatterton 1997
Rhynchonellata - Atrypida - Atrypidae
Plectatrypa savagei (Zhang 1989)
Jin and Chatterton 1997
Rhynchonellata - Athyridida - Meristellidae
Jin and Chatterton 1997
Jin and Chatterton 1997
Trilobita - Phacopida - Cheiruridae
Chatterton and Perry 1984
Chatterton and Perry 1984
Chatterton and Perry 1984
Chatterton and Perry 1984
Trilobita - Odontopleurida - Odontopleuridae
see common names

Geography
Country:Canada State/province:Northwest Territories
Coordinates: 62.4° North, 127.0° West (view map)
Paleocoordinates:1.4° North, 106.7° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Silurian Epoch: Llandovery - Wenlock
10 m.y. bin: Silurian 1 - Silurian 2
*Epoch:Late/Upper Llandovery - Early/Lower Wenlock
Key time interval: Llandovery - Wenlock Zone:  Pterospathodus amorphognathoides
Age range of interval: 443.1 - 426.7 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Whittaker
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.)
Lithology and environment
Primary lithology: argillaceous "limestone"
Secondary lithology: calcareous "shale"
Lithology description: Whittaker Fm. in general: "Beneath a distinctive buff-brown coloured shale unit, assigned to the base of the Delorme Fm., the strata consist of interbedded argillaceous limestones, calcareous shales, and cherty dolomites...The more carbonate-rich horizons contain rich silicified trilobite, conodont, and ostracode faunas. They also contain sparser coral, bryozoanb, brachiopod, mollusc, and other invertebrate faunas..."
Environment:deep subtidal shelf Tectonic setting:passive margin
Glacial or sequence phase:transgressive systems tract
Geology comments: "The strata assigned to the Whittaker Formation in these sections are largely deeper water platform margin or upper slope limestones and shales." Grand Cycle 1-2 transition.
SEP environmental call based on given information
Taphonomy
Modes of preservation:replaced with silica
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:taxonomic analysis
Metadata
Database number:26034
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-10-01 09:43:08 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-10-01 09:43:08
Creative Commons license:CC0
Reference information

Primary reference:
7215. B. D. E. Chatterton and D. G. Perry. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana 1:1-55 [M. Foote/M. Foote/M. Foote]

Secondary references:

7216 B. D. E. Chatterton and D. G. Perry. 1984. Silurian cheirurid trilobites from the Mackenzie Mountains, northwestern Canada. Palaeontographica Abteilung A 184(1-4):1-78 [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]