Cow Head Peninsula [Downes Point Mbr, Shallow Bay Fm]: Arcadian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Paterinata
- Paterinida
- Paterinidae
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Micromitra modesta
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4 specimens | |||||||||
| 2 ventral and 2 dorsal | ||||||||||
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Lingulata
- Acrotretida
- Acrotretidae
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Pegmatreta sp.
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4 specimens | |||||||||
| 4 ventral valves | ||||||||||
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Neotreta humberensis n. sp.
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4 specimens | |||||||||
| 3 ventral and 1 dorsal | ||||||||||
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Picnotreta laphocarita n. sp.
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22 specimens | |||||||||
| 11 ventral and 11 dorsal | ||||||||||
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unclassified
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Protreta interrupta
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11 specimens | |||||||||
| 9 ventral and 2 dorsal | ||||||||||
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Lingulata
- Acrotretida
- Acrotretidae
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Picnotreta robusta
Holmer et al. 1999
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14 specimens | |||||||||
| 11 ventral and 3 dorsal | ||||||||||
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Dactylotreta patriella
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11 specimens | |||||||||
| 11 ventral valves | ||||||||||
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Lingulata
- Lingulida
- Acrothelidae
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Orbithele sp.
Sdzuy 1955
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12 specimens | |||||||||
| 8 ventral valves and 4 dorsal valves (plus fragments) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Newfoundland and Labrador |
| Coordinates: | 49.9° North, 57.8° West (view map) | ||
| Paleocoordinates: | 7.5° North, 96.6° West (Wright 2013) | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Miaolingian |
| 10 m.y. bin: | Cambrian 3-4 | ||
| *Period: | Middle - Late/Upper Cambrian - Late/Upper Cambrian | *Epoch: | Late/Upper St. David's - Merioneth |
| *International age/stage: | Late/Upper Menevian - Dolgellian | *Local age/stage: | Marjuman - Sunwaptan |
| Key time interval: | Arcadian | ||
| Age range of interval: | 509 - 498.4 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Cow Head | Formation: | Shallow Bay | Member: | Downes Point |
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Approximately 100m thick. Many of the boulder clasts in the conglomerate appear to have been reworked from older sediments. A number of Middle Cambrina taxa were recovered from clasts in beds believed to be Sunwaptan in age. Note: Represents beds 1-5 from James and Stevens (1986), however fossils found only in beds 3-5. AGE: Arcadian; refined by A. Hendy (6/2009) on the basis of biostratigraphic data. | |||||
Lithology and environment
| Primary lithology: | lithified conglomerate |
| Secondary lithology: | lithified lime mudstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: conglomerates with minor interbeds of lime mudstone and shale, and some grainstone | |
| Environment: | slope |
| Geology comments: Part of the Humber Arm allochton in which the source of the allochthonous carbonate sediment is a platform that lay to the west. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Articulated whole bodies: | some |
| Associated major elements: | many |
| Fragmentation: | occasional |
| Spatial resolution: | allochthonous |
Collection methods and comments
| Collection methods: | chemical,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 10768 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2001-06-21 10:50:06 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2001-06-21 10:50:06 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 4018. | S. P. Robson and B. R. Pratt. 2001. Cambrian and Ordovician linguliform brachiopods from the Shallow Bay Formation (Cow Heard Group), Western Newfoundland. Journal of Paleontology 75(2):241-260 [M. Patzkowsky/P. Borkow] |