Molluscan Zone 9, Windmill 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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unclassified
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Busycotyphus coronatum
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Busycotyphus rugosum
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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
- Neogastropoda
- Conidae
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Conus deluvianus
Green 1830
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Gastropoda
- Neogastropoda
- Melongenidae
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Busycon fusiforme
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius (Triatiaria) peralta
(Conrad 1868)
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Bulliopsis quadrata
(Conrad 1830)
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Bulliopsis marylandica
(Conrad 1862)
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Buccinofusus parilis
(Conrad 1832)
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Gastropoda
- Neogastropoda
- Muricidae
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Urosalpinx subrusticus
(d'Orbigny 1852)
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Ecphora gardnerae
(Wilson 1987)
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| Subspecies: E. gardnerae gardnerae | ||||||||||
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Gastropoda
- Turritellidae
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Turritella plebeia
Say 1824
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| recombined as Mariacolpus plebeia | ||||||||||
| Subspecies: T. plebeia plebeia | ||||||||||
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Turritella subvariabilis
d'Orbigny 1852
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| Subspecies: T. subvariabilis subvariabilis | ||||||||||
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Bivalvia
- Arcida
- Arcidae
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Dallarca idonea
(Conrad 1832)
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Rasia andrewsi
Ward 1992
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| recombined as Anadara (Rasia) andrewsi | ||||||||||
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Bivalvia
- Ostreida
- Ostreidae
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Crassostrea sp.
Sacco 1897
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Bivalvia
- Pectinida
- Pectinidae
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Chesapecten santamaria
(Tucker 1934)
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Bivalvia
- Hiatellida
- Hiatellidae
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Panopea goldfussii
Wagner 1839
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Bivalvia
- Cardiida
- Cardiidae
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Chesacardium laqueatum
(Conrad 1830)
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| Subspecies: C. laqueatum laqueatum | ||||||||||
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Bivalvia
- Cardiida
- Tellinidae
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Florimetis biplicata
(Conrad 1834)
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria tetrica
(Conrad 1838)
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Dosinia acetabulum
(Conrad 1832)
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| Subspecies: D. acetabulum thori | ||||||||||
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Lirophora alveata
(Conrad 1831)
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| recombined as Lirophora (Lirophora) alveata | ||||||||||
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Clementia inoceriformis
(Wagner 1839)
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| recombined as Clementia (Clementia) inoceriformis | ||||||||||
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Bivalvia
- Cardiida
- Glossidae
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Glossus santamaria
Ward 1992
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Bivalvia
- Cardiida
- Mactridae
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Leptomactra delumbis
(Conrad 1832)
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Mactrodesma subponderosa
(d'Orbigny 1852)
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Bivalvia
- Lucinida
- Lucinidae
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Stewartia anodonta
(Say 1824)
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Bivalvia
- Carditida
- Astartidae
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Astarte perplana
Conrad 1840
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| 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: | Windmill Point | ||
| Local section: | Windmill Point | ||||
| Regional section: | St Marys River | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Unit B in Ward 1992 (Fig. 16), ~2.0 m of sand. Collection from Windmill Point of St Marys Fm, above the Little Cove Point Mbr of St Marys Fm, and underlies covered interval. | |||||
Lithology and environment
| Primary lithology: | burrows,fine,concretionary,glauconitic,shelly/skeletal unlithified conglomeratic sandstone |
| Includes fossils? | Y |
| Lithology description: Sand, fine, shelly, somewhat glauconitic. Very abundant mollusks, crab nodules, bone, and some cobbles along lower contact. Burrows into underlying bed up to 0.5 m. | |
| Environment: | coastal indet. |
| Glacial or sequence phase: | transgressive |
| Geology comments: Accumulated during a transgression. From open shelf marine conditions. | |
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: | 59303 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-03-25 15:26:35 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2006-03-25 15:26:35 |
| 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] |