Kylixocrinus-Cataractocrinus Association at the Upper Power Glen Shale: Llandovery, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Cataractocrinus clementi
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Crinoidea
- Monobathrida
- Patelliocrinidae
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Kylixocrinus latus
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Crinoidea
- Dendrocrinida
- Dendrocrinidae
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Dendrocrinus parvus
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Crinoidea
- Calceocrinida
- Calceocrinidae
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Calceocrinus sp.
Hall 1852
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| see common names | |||||||
Geography
| Country: | Canada | State/province: | Ontario | County: | Lincoln county |
| Coordinates: | 43.0° North, 79.3° West (view map) | ||||
| Paleocoordinates: | 24.2° South, 48.2° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | ||
| *Period: | Early/Lower Silurian | *Epoch: | Early/Lower Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Power Glen Shale | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Upper Power Glen (or Cabot Head) Shale, 6 m above base of Balls Falls | |||||
Lithology and environment
| Primary lithology: | gray,green lithified "shale" |
| Secondary lithology: | lithified calcareous siltstone |
| Includes fossils? | Y |
| Lithology description: This moderately diverse assemblage occurs in greenish gray shale with some interbedded thin calcareous siltstone. The crinoids are well articulated, indicating sudden burial by a pulse of sediment, presumably a distal silty tempestite. Thinness of individual beds, and much lower frequency of storm sand layers at this level, as compared to the lower 2 m of the Power Glen Shale at Jordan, suggest a more distal offshore position on the Medina clastic wedge. This was a generally low energy, mud to silt substrate environment. | |
| Environment: | prodelta |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 13289 | ||
| Authorizer: | M. Foote | Enterer: | K. Koverman |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-02-14 11:44:02 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-02-14 11:44:02 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4379. | T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner] |