Sekwi Formation - collection 73044: Early/Lower Cambrian, Canada
collected by W. H. Fritz
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Trilobita
- Ptychopariida
- Ptychopariidae
|
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Proliostracus annosus n. sp.
Fritz 1972
|
12 specimens | ||||||
|
aff. Proliostracus annosus n. sp.
Fritz 1972
|
1 specimen | ||||||
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Proliostracus latus n. sp.
Fritz 1972
|
1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Canada | State/province: | Northwest Territories | County: | District of Mackenzie |
| Coordinates: | 63.5° North, 128.7° West (view map) | ||||
| Paleocoordinates: | 7.7° South, 71.0° West | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Cambrian | ||
| 10 m.y. bin: | Cambrian 1-3 | ||
| Key time interval: | Early/Lower Cambrian | Trilobite zone: | Bonnia-Olenellus |
| Age range of interval: | 538.80000 - 509.00000 m.y. ago |
Stratigraphy
| Formation: | Sekwi | ||
| Local section: | Mackenzie Mountain | Local bed: | 1378 ft |
| Local order: | top to bottom | ||
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | fine,gray,blue lithified "limestone" |
| Lithology description: limestone interbedded in medium to thick-bedded, range weathering dolomite, light grey and finely crystalline on fresh surfaces | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | observed (not collected) |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | GSC |
| Collectors: | W. H. Fritz |
| Collection method comments: Trilobites only;collection 73044, 1378 ft above base of formation | |
Metadata
| Database number: | 156173 | ||
| Authorizer: | M. Hopkins | Enterer: | S. Mahmood |
| Modifier: | M. Uhen | Research group: | marine invertebrate |
| Created: | 2014-05-12 09:29:23 | Last modified: | 2017-05-18 16:45:33 |
| Access level: | the public | Released: | 2014-05-12 09:29:23 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 51093. | W. H. Fritz. 1972. Lower Cambrian trilobites from the Sekwi Formation type section, northwestern Canada. In M. Rafuse (ed.), Geological Survey of Canada Bulletin 212 [M. Hopkins/S. Mahmood/S. Mahmood] |