Bluff Head, Totoket Mountain: Hettangian, Connecticut
collected by B. Cornet & N. G. McDonald 1970
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Actinopteri
- Semionotiformes
- Semionotidae
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Semionotus sp.
Agassiz 1832
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Schaeffer and McDonald 1978 | |||||||||
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Palaeonisciformes
- Redfieldiidae
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Redfieldius gracilis
(Redfield 1837)
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Schaeffer and McDonald 1978 | 1000 specimens | ||||||||
| AMNH5824,5825, AMNH 6702-6726, AMNH 6733, 6734, AMNH 6736-6750, 6758, 6759, 6761-6769 | ||||||||||
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Coelacanthimorpha
- Coelacanthiformes
- Dipluridae
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Diplurus longicaudatus
Newberry 1878
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Schaeffer and McDonald 1978 | 1 specimen | ||||||||
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Reptilia
- Coelophysidae
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Coelophysis sp.
Cope 1889
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Galton 1976 | 1 specimen | ||||||||
| tooth | ||||||||||
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Ptycholepiformes
- Ptycholepididae
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Ptycholepis marshi
Newberry 1878
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7 specimens | |||||||||
| corrected as Ptycholepis marshii | ||||||||||
| AMNH 4519, 4676, 4677, 4713–4715, 4718 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Connecticut | County: | New Haven |
| Coordinates: | 41.4° North, 72.8° West (view map) | ||||
| Paleocoordinates: | 22.1° North, 19.6° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 560 feet | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| Stage: | Hettangian | 10 m.y. bin: | Jurassic 1 |
| Key time interval: | Hettangian | ||
| Age range of interval: | 201.40000 - 199.50000 m.y. ago |
Stratigraphy
| Geological group: | Meriden | Formation: | Shuttle Meadow |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | black silty,carbonaceous "shale" |
| Secondary lithology: | planar lamination,black,gray calcareous "shale" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: "black shale" "The upper part of this unit is composed of a fissile, carbonaceous, micaceous, silty black shale with minor clay lenses, the lower part consists of slabby, dark gray to black, microlaminated, calcareous shale and shaly limestone. The unit is overlain by a thick bed of buff-brown quartz sandstone, and underlain by a light brown to white clay bed" | |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body,adpression |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils,mesofossils |
| Preservation of anatomical detail: | excellent |
| Disassociated major elements: | all |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | surface (in situ),field collection,survey of museum collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | AMNH,YPM | ||
| Collectors: | B. Cornet & N. G. McDonald | Collection dates: | 1970 |
| Collection method comments: collected 1970 by B. Cornet and N. G. McDonald | |||
Metadata
| Also known as: | North Guilford | ||
| Database number: | 47198 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-02-18 08:02:41 | Last modified: | 2022-01-13 12:53:09 |
| Access level: | the public | Released: | 2005-02-18 08:02:41 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 35711. | B. Schaeffer, D. H. Dunkle, and N. G. McDonald. 1975. Ptycholepis marshi Newberry, a chondrostean fish from the Newark Group of eastern North America. Fieldiana Geology 33(12):205-233 [M. Uhen/M. Shalap/M. Carrano] |
Secondary references:
| 12624 | ETE | P. M. Galton. 1976. Prosauropod dinosaurs (Reptilia: Saurischia) of North America. Postilla 169:1-98 [M. Carrano/M. Carrano/M. Carrano] |
| 79067 | B. Schaeffer and N. G. McDonald. 1978. Redfieldiid fishes from the Triassic-Liassic Newark Supergroup of eastern North America. Bulletin of the American Museum of Natural History 159(4):129-174 [M. Carrano/M. Carrano] |