Molluscan Zone 10, Little Cove Point Mbr, St. Marys Fm - Murfreesboro: Late/Upper Miocene, Maryland
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea goldfussii
Wagner 1839
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria cuneata
Conrad 1869
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius (Tritiaria) peralta
(Conrad 1868)
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Gastropoda
- Neogastropoda
- Terebridae
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Terebra simplex
Conrad 1830
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| recombined as Laevihastula simplex | |||||||
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Gastropoda
- Turritellidae
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Turritella plebeia
Say 1824
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| recombined as Mariacolpus plebeia | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Maryland | County: | St Marys |
| Coordinates: | 38.2° North, 76.5° West (view map) | ||||
| Paleocoordinates: | 38.3° North, 74.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Late/Upper Miocene | ||
| Age range of interval: | 11.63000 - 5.33300 m.y. ago |
Stratigraphy
| Formation: | St Marys | Member: | Little Cove Point | ||
| Local section: | Windmill Point | ||||
| Regional section: | St Marys River | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Unit A in Ward 1992 (Fig. 16), ~1.0 m of sand. Collection from Little Cove Point Mbr of St Marys Fm, at base of the section, and underlies Windmill Point Mbr, St Marys Fm. | |||||
Lithology and environment
| Primary lithology: | very fine unlithified silty sandstone |
| Includes fossils? | Y |
| Lithology description: Sand, silty, very fine. Thin (2cm), somewhat undulating bed of Turritella persists along entire exposure. Other shell material is generally small and scattered. | |
| Environment: | coastal indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: Accumulated during a transgression following the post-Conoy deposition event regression. From open shelf conditions in embayment. | |
Taphonomy
| Modes of preservation: | body |
| 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: | 59302 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-03-25 15:21:25 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2006-03-25 15:21:25 |
| 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] |