Governor Run, Zone 17: Serravallian, Maryland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Carcharhiniformes
- Hemigaleidae
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Hemipristis serra
Agassiz 1835
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Uhen 2007 | ||||||
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Chondrichthyes
- Carcharhiniformes
- Galeocerdidae
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Galeocerdo aduncus
(Agassiz 1835)
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Uhen 2007 | ||||||
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Mammalia
- Cetacea
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Siphonocetus priscus
(Leidy 1851)
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Helm 1939 | ||||||
| nomen dubium belonging to Siphonocetes | |||||||
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Megaptera expansa
Cope 1868
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Uhen 2007 | ||||||
| nomen dubium belonging to Mysticeti | |||||||
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Malacostraca
- Decapoda
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Cancroidea indet.
Latreille 1802
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Martin 1904 | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Maryland | County: | Calvert |
| Coordinates: | 38.5° North, 76.5° West (view map) | ||||
| Paleocoordinates: | 38.7° North, 73.6° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
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: | Choptank | Member: | Drumcliff |
| Regional section: | Shattuck | Regional bed: | 17 | ||
| Regional order: | bottom to top |
Lithology and environment
| Primary lithology: | yellow sandstone |
| Includes fossils? | Y |
| Lithology description: yellow sand | |
| Environment: | shoreface |
| Geology comments: Mollusk-dense pale yellow-brown to pale orange well-sorted sand; sub-tropical to temperate, in a current-swept channel-like basin; area not far from shore, bay, short-term eustatic transgression events, long-term regression trend
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Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 70838 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen, M. Shalap |
| Modifier: | G. Varnham | Research group: | marine invertebrate,vertebrate |
| Created: | 2007-04-09 14:32:28 | Last modified: | 2022-03-03 05:07:04 |
| Access level: | the public | Released: | 2007-04-09 14:32:28 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23697. | G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen] |
Secondary references:
| 39918 | O. L. Helm. 1939. Preliminary Report on Fossil Whale Mandibles. Maryland Natural History Society Bulletin 9(12):107-110 [M. Uhen/M. Shalap/M. Shalap] | |
| 23767 | G. C. Martin. 1904. Malacostraca. Maryland Geological Survey Miocene(Text):94 [M. Uhen/M. Uhen/M. Uhen] | |
| 24251 | M. D. Uhen. 2007. USNM Chesapeake Group Cetacean Collection Data. [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] |