Southwestern District of Mackenzie, Caribou Range (S-80): Whiterockian, Canada
collected by Rolf Ludvigsen 1971-1973

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Proetida - Bathyuridae
Ludvigsenella ellipsepyga Tremblay and Westrop 1991
recombined as Psephosthenaspis ellipsepyga
Bathyurus mackenziensis Tremblay and Westrop 1991
Trilobita - Phacopida - Cheiruridae
Xystocrania perforator (Billings 1865)
Cydonocephalus cf. torulus Whittington 1963
recombined as Kawina torulus
see common names

Geography
Country:Canada State/province:Northwest Territories County:District of Mackenzie
Coordinates: 61.2° North, 125.8° West (view map)
Paleocoordinates:5.4° North, 60.4° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Ordovician
10 m.y. bin:Ordovician 2-4
Key time interval:Whiterockian Trilobite zone: Bathyurus mackenziensis
Age range of interval:470.00000 - 457.00000 m.y. ago
Stratigraphy
Formation:Sunblood
Local section:Caribou Range Section S Local bed:80 ft
Local order:bottom to top
Lithology and environment
Primary lithology: "limestone"
Environment:shallow subtidal indet.
Geology comments: Environment based on Tremblay and Westrop (1991) description of Sunblood Formation
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils,microfossils
Collection methods and comments
Collection excludes:all macrofossils
Collection methods:chemical,survey of museum collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:GSC
Collectors:Rolf Ludvigsen Collection dates:1971-1973
Metadata
Database number:102258
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:M. Hopkins Research group:marine invertebrate
Created:2011-01-12 06:07:13 Last modified:2011-01-14 15:54:29
Access level:the public Released:2011-01-12 06:07:13
Creative Commons license:CC BY
Reference information

Primary reference:
34691. J. V. Tremblay and S. R. Westrop. 1991. Middle Ordovician (Whiterockian) trilobites from the Sunblood Formation, District of Mackenzie, Canada. Journal of Paleontology 65(5):801-824 [M. Hopkins/M. Hopkins]