GSC 85784: Blackhillsian, Canada
collected by W. T. Dean, B. S. Norford 1980

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
informal kainellid indet.
informal asaphid indet.
Trilobita - Phacopida - Pliomeridae
? Protopliomerops radiatus Kobayashi 1955
Trilobita - Trinucleida - Raphiophoridae
Ampyx walcotti Kobayashi 1955
Trilobita - Asaphida - Asaphidae
Lachnostoma sp. Ross 1951
Presbynileus (Presbynileus) sp. Jaanusson 1959
Ptyocephalus cf. declevitus (Ross 1951)
see common names

Geography
Country:Canada State/province:British Columbia
Coordinates: 50.7° North, 116.0° West (view map)
Paleocoordinates:2.9° South, 71.8° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Ordovician Epoch: Early Ordovician
Stage: Floian 10 m.y. bin: Ordovician 2
Key time interval: Blackhillsian Graptolite zone:  Didymograptus protobifidus
Age range of interval: 473.9 - 470 m.y. ago
Stratigraphy
Geological group:McKay Formation:Outram
Stratigraphic resolution:bed
Stratigraphy comments: Collected from 26.8 to 27.1 m below base of overlying Mount Wilson Quartzite. Also coeval with trilobite Zone "J" of Ross (1951) and Hintze (1952). This is the upper part of the Outram formation (PJW).
Lithology and environment
Primary lithology:gray lithified "limestone"
Environment:carbonate indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:GSC
Collectors:W. T. Dean, B. S. Norford Collection dates:1980s
Metadata
Database number:111537
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:P. Wagner Research group:marine invertebrate
Created:2011-06-25 01:06:57 Last modified:2018-04-07 15:38:00
Access level:the public Released:2011-06-25 01:06:57
Creative Commons license:CC BY
Reference information

Primary reference:
36505. W. T. Dean. 1988. Lower Ordovician trilobites from the uppermost McKay Group at its type section, southeastern British Columbia. Geological Survey of Canada Bulletin 379:1-15 [M. Hopkins/M. Hopkins]