Compsocrinus-Dendrocrinus Association of the Bear Creek Shale: Llandovery, New York
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Crinoidea
- Monobathrida
- Tanaocrinidae
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Compsocrinus relictus
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Crinoidea
- Diplobathrida
- Dimerocrinitidae
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? Ptychocrinus sp.
Wachsmuth and Springer 1885
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Crinoidea
- Dendrocrinida
- Dendrocrinidae
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Dendrocrinus ursae
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Rhynchonellata
- Rhynchonellida
- Leptocoeliidae
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Eocoelia hemispherica
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| see common names | |||||||
Geography
| Country: | United States | State/province: | New York | County: | Wayne County |
| Coordinates: | 43.1° North, 77.1° West (view map) | ||||
| Paleocoordinates: | 24.8° South, 46.6° 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: | Late/Upper Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Bear Creek Shale | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Upper beds of Bear Creek Shale | |||||
Lithology and environment
| Primary lithology: | gray,green lithified "shale" |
| Lithology description: Sparsely to abundantly fossiliferous dark greenish gray to dusky purple shales, with some bedding planes covered with mainly disarticulated valves of Eocoelia. | |
| Environment: | transition zone/lower shoreface |
| Geology comments: The association of this crinoid with abundant Eocoelia hemispherica indicates BA 2 (shallowest subtidal range). The Bear Creek Shale clearly lies shoreward of the BA 3 Wallington Limestone and represents and inner shelf, low-energy mud bottom environment. | |
Taphonomy
| Modes of preservation: | body,cast |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 13290 | ||
| Authorizer: | M. Foote | Enterer: | K. Koverman |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-02-14 12:00:13 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-02-14 12:00:13 |
| 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] |