Severn Formation Locality A (Cattail Brook): Maastrichtian, Maryland
collected by R. Johnson, G. Medwick & H. Mendryk
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Mosasauridae
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Mosasaurus maximus
Cope 1869
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Baird 1986 | 1 specimen | ||||||||
| synonym of Mosasaurus hoffmannii | ||||||||||
| MAPS A1218a | ||||||||||
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Reptilia
- Hadrosauridae
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Hadrosauridae indet.
Cope 1869
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1 specimen | |||||||||
| USNM 336469 (pers. comm. J. R. Horner 1982) | ||||||||||
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Reptilia
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Ornithomimus antiquus
(Leidy 1865)
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Baird 1986 | 1 specimen | ||||||||
| nomen dubium belonging to Ornithomimosauria | ||||||||||
| PU 23503 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Maryland | County: | Prince George's |
| Coordinates: | 38.9° North, 76.9° West (view map) | ||||
| Paleocoordinates: | 39.8° North, 52.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| *Period: | Late/Upper Cretaceous | *Epoch: | Senonian |
| *International age/stage: | Middle Maastrichtian | ||
| Key time interval: | Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Severn |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | not reported |
| Lithology description: none given | |
| Environment: | coastal indet. |
| Geology comments: "near-shore deposits on the continental shelf" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Museum repositories: | USNM |
| Collectors: | R. Johnson, G. Medwick & H. Mendryk |
Metadata
| Also known as: | Loc. 1 of Brouwers and Hazel 1978, Brightseat | ||
| Database number: | 27562 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2002-12-11 15:01:34 | Last modified: | 2023-06-15 10:58:56 |
| Access level: | the public | Released: | 2002-12-11 15:01:34 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 61518. | D. B. Weishampel and J. B. Weishampel. 1983. Annotated localities of ornithopod dinosaurs: implications to Mesozoic paleobiogeography. The Mosasaur 1:43-87 [M. Carrano/M. Carrano] |
Secondary references:
| 773 | D. Baird. 1986. Upper Cretaceous reptiles from the Severn Formation of Maryland. The Mosasaur 3:63-85 [J. Alroy/M. Sommers/M. Uhen] | |
| 85047 | D. B. Weishampel and L. Young. 1996. Dinosaurs of the East Coast xiii-275 [M. Carrano/M. Carrano] |