GSC locality 92317: Blackhillsian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Asaphida
- Asaphidae
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Ptyocephalus declevitus
(Ross 1951)
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Alberta |
| Coordinates: | 52.9° North, 118.1° West (view map) | ||
| Paleocoordinates: | 1.2° South, 69.9° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Early Ordovician |
| Stage: | Floian | 10 m.y. bin: | Ordovician 2 |
| *Period: | Early/Lower Ordovician | *Epoch: | Tremadoc |
| Key time interval: | Blackhillsian | Trilobite zone: | J |
| Age range of interval: | 473.9 - 470 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Skoki | Member: | Sikanni Chief | ||
| Regional section: | Skoki | Regional bed: | 6.4 m | ||
| Regional order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The deposits comprise detrital belts near the margin of Laurentia. Part of the Ordovician Ibex Series.
Given as Tremadocian; however, Zone J is Blackhillsian (PJW). Basal part of Skoki is the Sikanni Chief member now (PJW). | |||||
Lithology and environment
| Primary lithology: | lithified cherty/siliceous dolomite |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Articulated whole bodies: | none |
| Disassociated major elements: | all |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | GSC |
| Collection method comments: Brachiopods are mentioned to occur in the formation, but their placement and lower taxa names are not given. An index of A to M is used to designate Ordovician biozones (Ross, 1949, 1951a, p.27-29) for the Wilcox Pass Area. | |
Metadata
| Also known as: | Was: GSC locality 92317, Skoki Fm., Biozone J, Alberta, Canada - Dean 1989 | ||
| Database number: | 10897 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2001-07-05 12:26:26 | Last modified: | 2013-08-08 15:47:53 |
| Access level: | the public | Released: | 2001-07-05 12:26:26 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 4045. | W. T. Dean. 1989. Trilobites from the Survey Peak, Outram and Skoki Formations (Upper Cambrian-Lower Ordovician) at Wilcox Pass, Jasper National Park, Alberta). Geological Survey of Canada Bulletin (389)1-141 [M. Patzkowsky/P. Borkow/P. Borkow] |