Randle Cliff Beach, south Zone 14-15: Serravallian, Maryland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Globothalamea
- Rotaliida
- Nonionidae
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Nonion calvertensis
Gibson 1983
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Gibson 1983 | |||||||||
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Mammalia
- Carnivora
- Phocidae
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Leptophoca lenis
True 1906
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Koretsky 2001 | |||||||||
| synonym of Leptophoca proxima | ||||||||||
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Mammalia
- Tayassuidae
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Cynorca proterva
Cope 1867
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1 specimen | |||||||||
| nomen dubium belonging to Cynorca | ||||||||||
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Mammalia
- Cetacea
- Physeteridae
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Orycterocetus crocodilinus
Cope 1867
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Kellogg 1965 | 1 specimen | ||||||||
| presumably Zone 11 | ||||||||||
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Mammalia
- Perissodactyla
- Rhinocerotidae
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? Aphelops sp.
Owen 1845
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1 specimen | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Maryland | County: | Calvert |
| Coordinates: | 38.7° North, 76.5° West (view map) | ||||
| Paleocoordinates: | 38.9° North, 73.7° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Serravallian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Serravallian | ||
| Age range of interval: | 13.82000 - 11.63000 m.y. ago |
Stratigraphy
| Geological group: | Chesapeake | Formation: | Calvert | Member: | Calvert Beach |
| Regional section: | Shattuck | Regional bed: | 14-15 | ||
| Regional order: | bottom to top | ||||
| Stratigraphy comments: Zone 14 or 15
Zones 14-16A are regarded as Serravallian in age. | |||||
Lithology and environment
| Primary lithology: | brown,yellow sandy claystone |
| Environment: | foreshore |
| Geology comments: relatively non-diverse mollusc assemblage, open-marine, shallow shelf | |
Taphonomy
| Modes of preservation: | body,original phosphate |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 49945 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2005-05-02 12:25:30 | Last modified: | 2022-03-03 05:28:47 |
| Access level: | the public | Released: | 2005-05-02 12:25:30 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13413. | C. L. Gazin and R. L. Collins. 1950. Remains of land mammals from the Miocene of the Miocene of the Chesapeake Bay Region. Smithsonian Miscellaneous Collections 116(2):1-21 [M. Uhen/M. Uhen/M. Uhen] |
Secondary references:
| 14892 | L. de Verteuil and G. Norris. 1996. Dinoflagellate cyst zonation and allostratigraphy of the Chesapeake Group. Micropaleontology 42:1-25 [M. Uhen/M. Uhen/M. Uhen] | |
| 17886 | T. G. Gibson. 1983. Key foraminifera from upper Oligocene to lower Pleistocene strata of the central Atlantic coastal plain. Smithsonian Contributions to Paleobiology 53:355-453 [M. Uhen/M. Uhen] | |
| 15352 | R. Kellogg. 1965. The Miocene Calvert sperm whale Orycterocetus. Bullten of the United States National Museum 247(2):47-63 [M. Uhen/M. Uhen] | |
| 17253 | I. Koretsky. 2001. Morphology and systematics of Miocene Phocinae (Mammalia: Carnivora) from Paratethys and the North Atlantic region. Geologica Hungarica Series Palaeontologica 54:1-109 [M. Uhen/M. Uhen] | |
| 32709 | L. W. Ward and G. W. Andrews. 2008. Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay Area, Maryland and Virginia. Virginia Museum of Natural History Memoir 1-169 [M. Uhen/M. Uhen] |