GSC #75210 - Good Hope Lake section, Cassiar Mountains: Atdabanian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Anthozoa
- Tabulaconida
- Tabulaconidae
|
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | British Columbia |
| Coordinates: | 59.3° North, 129.2° West (view map) | ||
| Paleocoordinates: | |||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| Stage: | Stage 3 | 10 m.y. bin: | Cambrian 2 |
| Key time interval: | Atdabanian | ||
| Age range of interval: | 521 - 516 m.y. ago |
Stratigraphy
| Geological group: | Atan | Formation: | Sekwi | Member: | Limestone |
| Local section: | Good Hope Lake | Local bed: | 850 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Longest continuous section containing Archaeocyathids in northwestern North America where archaeocyathidfs occur over a sttratigraphic distance of 750 feet within the lower 900 ft of the limestone unit of the Atan Group. Section measured in the limestone ("upper") unit of the Atan Group. Collection form 850 ft above base of limestone unit. | |||||
Lithology and environment
| Primary lithology: | dolomitic,ooidal "limestone" |
| Includes fossils? | Y |
| Lithology description: Collection from oolitic limestone facies. Evidence of dolomitization is prevelant at this section. | |
| Environment: | shallow subtidal indet. |
| Geology comments: The Atan Group probably represented relatively stable conditions on the Pelly-Cassiar Platform. The limestone unit possibly represents a large carbonate unit with water depths ranging from subtidal (oolite accumulations) to in excess of 50 m. | |
Taphonomy
| Modes of preservation: | body,replaced with dolomite |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | GSC |
| Collection method comments: Collections made by Handfield during 1965 and 1966. Collections are reposited at Geological Survey of Canada | |
| Taxonomic list comments:Exhaustive fro archaeocyathids | |
Metadata
| Also known as: | 75210 | ||
| Database number: | 49009 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2005-04-05 14:33:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2005-04-05 14:33:37 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 13072. | R. C. Handfield. 1971. Archaeocyatha from the MacKenzie and Cassiar Mountains, Northwest Territories, Yukon Territory and British Columbia. Geological Survey of Canada Bulletin 201:1-119 [A. Miller/A. Hendy/A. Hendy] |