Alberta Farrow Well (Deadwood Fm) - 8755 ft: St Davids, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Lingulata
- Acrotretida
- Acrotretidae
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Stilpnotreta magna
Henderson and MacKinnon 1981
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Opisthotreta sp.
Palmer 1954
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Paterinata
- Paterinida
- Paterinidae
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Micromitra sp.
Meek 1873
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Geography
| Country: | Canada | State/province: | Alberta |
| Coordinates: | 50.7° North, 113.4° West (view map) | ||
| Paleocoordinates: | 5.2° South, 80.4° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | hand sample |
Time
| Period: | Cambrian | Epoch: | Miaolingian |
| 10 m.y. bin: | Cambrian 3-4 | ||
| Key time interval: | St Davids | ||
| Age range of interval: | 509.00000 - 497.00000 m.y. ago |
Stratigraphy
| Formation: | Deadwood | ||||
| Local section: | Alberta Farrow Well | Local bed: | 8755 ft | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: AGE: Marjuman (late Middle to early Late Cambrian) in age. Correlates to upper St Davids.
SPECIFIC COMMENTS: Collected from 8755 ft below surface. | |||||
Lithology and environment
| Primary lithology: | "limestone" |
| Secondary lithology: | "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: Limestone beds, intercalated within a succession of sandstones, siltstone, and shales. | |
| Environment: | shallow subtidal indet. |
| Geology comments: Deposited in a shallow intracontinental sea shoreward of the passive margin of western Laurentia. | |
Taphonomy
| Modes of preservation: | body,replaced with phosphate |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | poor |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | core,chemical,acetic,sieve,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | GSC |
| Collection method comments: Limestone samples were dissolved in 10% acetic acid. Insoluable residues were screened using 200 mesh (75 micron opening) sieves, then separated in tetrabromethane at specific gravity of 2.85. Conondonts and phosphatic shelled brachiopods were handpicked from the residue. Figured specimens are deposited at the Geological Survey of Canada (GSC), Alberta, Canada | |
| Taxonomic list comments:Exhaustive for brachiopods. Further data required to add conodonts to taxonomic lists. | |
Metadata
| Database number: | 49207 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2005-04-11 07:04:25 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2005-04-11 07:04:25 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13141. | S.P. Robson, G.S. Nowlan, and B.R. Pratt. 2003. Middle to Upper Cambrian linguliformean brachiopods from the Deadwood Formation of subsurface Alberta and Saskatchewan, Canada. Journal of Paleontology 77(2):201-211 [A. Miller/A. Hendy/A. Hendy] |