Cheshire, Erpetosuchus: Norian, Connecticut
collected by P. Olsen 1995
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Archosauria
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Erpetosuchus sp.
Newton 1894
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1 individual | archosaur |
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| AMNH 29300, partial skull | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Connecticut |
| Coordinates: | 41.5° North, 72.8° West (view map) | ||
| Paleocoordinates: | 18.9° North, 18.9° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | small collection |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Norian | 10 m.y. bin: | Triassic 4 |
| Key time interval: | Norian | ||
| Age range of interval: | 216.5 - 203.6 m.y. ago |
Stratigraphy
| Geological group: | Newark | Formation: | New Haven | ||
| Stratigraphy comments: lower part of the New Haven Formation of the Hartford Basin (Newark Supergroup). "The stratigraphic age of the Connecticut record of Erpetosuchus has been constrained as Norian by three independent lines of evidence. First, the basal portion of the New Haven Formation has yielded a palynoflorule dated as latest Carnian to early Norian. Second, using U-Pb dating, Wang et al. (1998) determined the age of pure pedogenic micritic calcite extracted from the fossil-bearing horizon as 211.9 +/- 2.1 Ma, placing it in the Norian stage on recent geological timescales...Third, Lucas et al. (1998) synonymized Stegomus with Aetosaurus and considered the latter taxon an index fossil for continental strata of early to middle Norian age" | |||||
Lithology and environment
| Primary lithology: | burrows,bioturbation,red sandy mudstone |
| Includes fossils? | Y |
| Lithology description: "Red sandy mudstone, which forms part of a sequence of gray, buff, and brown sedimentary deposits of a meandering river alternating with red overbank sediments. The mudstone is intensely bioturbated by roots and invertebrate burrows and passes upward into caliche-bearing red sandy mudstone. This sequence comprises a typical paleosol profile in the lower New Haven Formation" | |
| Environment: | fluvial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Associated major elements: | all |
Collection methods and comments
| Collection methods: | field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | AMNH | ||
| Collectors: | P. Olsen | Collection dates: | 1995 |
Metadata
| Database number: | 92024 | ||
| Authorizer: | R. Butler | Enterer: | R. Butler | Research group: | vertebrate |
| Created: | 2009-10-27 08:35:12 | Last modified: | 2009-10-27 10:35:12 |
| Access level: | the public | Released: | 2009-10-27 08:35:12 |
Reference information
Primary reference:
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