A0631: Rhuddanian, Canada
collected by P. Copper
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Strophomenata
- Strophomenida
- Strophomenidae
|
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Leptaena quadrilatera
(Logan 1863)
|
120 specimens | ||||||
| see common names | |||||||
Geography
| Country: | Canada | State/province: | Quebec |
| Coordinates: | 49.7° North, 63.6° West (view map) | ||
| Paleocoordinates: | 20.6° South, 89.2° West (Wright 2013) | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | small collection |
Time
| Period: | Silurian | Epoch: | Llandovery |
| Stage: | Rhuddanian | 10 m.y. bin: | Silurian 1 |
| Key time interval: | Rhuddanian | Conodont zone: | Oulodus nathani |
| Age range of interval: | 443.8 - 440.8 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | hummocky CS lithified calcareous lime mudstone | ||
| Lithology description: Member description taken from 2007 Long. Tempestite frequency curves: a key to Late Ordovician and Early Silurian subsidence, sea-level change, and orbital forcing in the Anticosti foreland basin, Quebec, Canada. Can. J. Earth Sci. Vol. 44, 413-431. "The basal Fox Point member is dominated by thin-bedded sets of relatively clean unlaminated and laminated micrite, which are separated by thin sets of siliciclastic-rich carbonate mudstones. The lower part of the unit contains abundant discontinuous grainstone and carbonate sandstone units, with hummocky cross-stratification and local development of ball-and-pillow structures in proximity to stepped irregularities on the basal flooding surface (Fig. 3E; Long and Copper 1994). The Fox Point member thins from 22 m in the west to as little as 3.6 m in the east (Sami 1989)." | |||
| Environment: | carbonate indet. | Tectonic setting: | foreland basin |
Taphonomy
| Modes of preservation: | body,original calcite |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | bulk,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | P. Copper |
| Taxonomic list comments:Brachiopods only. | |
Metadata
| Database number: | 158629 | ||
| Authorizer: | S. Finnegan | Enterer: | S. Finnegan |
| Modifier: | S. Finnegan | ||
| Created: | 2014-07-21 20:53:56 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2014-07-21 20:53:56 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 51869. | K. Dewing. 1999. Late Ordovician and Early Silurian strophomenid brachiopods of Anticosti Island, Quebec, Canada. In A. D. McCracken (ed.), Palaeontographica Canadiana 17:1-143 [S. Finnegan/S. Finnegan] |