Molluscan Zone 5, Rushmere Mbr, Yorktown Fm - Murfreesboro: Late/Upper Pliocene, North Carolina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Pectinida
- Pectinidae
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Chesapecten madisonius
(Say 1824)
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Bivalvia
- Ostreida
- Ostreidae
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Conradostrea sculpturata
(Conrad 1840)
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Ostrea compressirostra
Say 1824
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| Subspecies: O. compressirostra raveneli | ||||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Costaglycymeris subovata
(Say 1824)
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Bivalvia
- Cardiida
- Chamidae
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Chama congregata
Conrad 1833
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria rileyi
(Conrad 1838)
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| recombined as Mercenaria campechiensis rileyi | ||||||||||
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea reflexa
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Bivalvia
- Carditida
- Crassatellidae
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Marvacrassatella undulatus
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Bivalvia
- Carditida
- Astartidae
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Astarte undulata
Say 1824
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| recombined as Astarte (Ashtarotha) undulata | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | North Carolina | County: | Herford |
| Coordinates: | 36.4° North, 77.1° West (view map) | ||||
| Paleocoordinates: | 36.5° North, 76.4° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Late/Upper Pliocene | ||
| Age range of interval: | 3.60000 - 2.58000 m.y. ago |
Stratigraphy
| Formation: | Yorktown | Member: | Rushmere | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Unit C in Ward 1992 (Fig. 10), ~1.0 m of sand. Collection from Rushmere Mbr of Yorktown Fm, above the Sunken Meadow Mbr of the Yorktown Fm and underlies a covered interval. Local section name: Murfreesboro. Basinal/regional section name: Hertford County. | |||||
Lithology and environment
| Primary lithology: | fine,glauconitic,shelly/skeletal unlithified sandy sandstone |
| Includes fossils? | Y |
| Lithology description: Sand; weathered, fine, very sandy, slightly glauconitic; aragonitic shells partially decomposed. | |
| Environment: | coastal indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: No geologic or environmental data provided in text. Presumably accumulated during a successive transgression following post Eastover Fm regression. Appears to contain a normal marine fauna. | |
Taphonomy
| Modes of preservation: | body,cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection,survey of museum collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USNM |
| Collection method comments: Most material appears to be reposited in USNM and USGS collections | |
| Taxonomic list comments:Probably not exhaustive, but a summary of the common and abundant forms from unit. Modern nomenclature utilized with species level assignments. | |
Metadata
| Database number: | 59301 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | G. Varnham | Research group: | GCP,marine invertebrate |
| Created: | 2006-03-25 15:13:04 | Last modified: | 2022-05-12 04:48:24 |
| Access level: | the public | Released: | 2006-03-25 15:13:04 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 16985. | L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy] |