USGS Loc. 2238 - Flournoy's Mill [Shoal River Fm]: Serravallian, Florida
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris waltonensis
Gardner 1947
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| recombined as Costaglycymeris waltonensis | ||||||||||
| rare; ? in occurrence table | ||||||||||
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Bivalvia
- Arcida
- Arcidae
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Arca (Diluvarca) waltonia
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| spelled with current rank as Anadara (Diluvarca) | ||||||||||
| rare | ||||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Phacoides (Pseudomiltha) paranodonta
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| original and current combination Pseudomiltha | ||||||||||
| rare | ||||||||||
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Phacoides (Parvilucina) vaughani
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| spelled with current rank as Parvilucina | ||||||||||
| common | ||||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula waltonensis
Gardner 1928
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| synonym of Varicorbula disparilis | ||||||||||
| present | ||||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Cardium (Cerastoderma) waltonianum
Dall 1900
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| common | ||||||||||
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Bivalvia
- Cardiida
- Semelidae
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Semele paramutica
Gardner 1947
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| present | ||||||||||
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Ervilia condra
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| rare; ? in occurrence table | ||||||||||
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Bivalvia
- Cardiida
- Ungulinidae
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Diplodonta leptodoma
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| rare | ||||||||||
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Diplodonta acclinis
(Conrad 1832)
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| rare | ||||||||||
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Bivalvia
- Cardiida
- Mactridae
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Spisula (Hemimactra) valhosierr
Gardner 1947
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| recombined as Leptomactra valhosierr | ||||||||||
| present | ||||||||||
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia soror
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| rare | ||||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula chipolana
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| present; N. chipolana waltonia | ||||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica quadriseriata
(Sowerby 1850)
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| synonym of Architectonica nobilis | ||||||||||
| rare; A. quadriseriata waltonensis | ||||||||||
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Gastropoda
- Naticidae
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Polinices judsoni
(Maury 1910)
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| original and current combination Natica judsoni | ||||||||||
| rare; ? in occurrence table | ||||||||||
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Polinices (Neverita) eucallosus
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| original and current combination Neverita | ||||||||||
| common | ||||||||||
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Sinum waltonense
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| present | ||||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Hesperisternia waltonia
Gardner 1944
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| rare | ||||||||||
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Gastropoda
- Neogastropoda
- Melongenidae
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Busycon dasum n. sp.
Gardner 1947
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| rare | ||||||||||
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Gastropoda
- Neogastropoda
- Nassariidae
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Uzita waltonensis
(Gardner 1936)
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| recombined as Nassarius (Uzita) waltonensis | ||||||||||
| rare | ||||||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Cancellaria waltoniana
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| rare | ||||||||||
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Gastropoda
- Neogastropoda
- Drilliidae
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Agladrillia empera
Gardner 1938
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| recombined as Clathrodrillia empera | ||||||||||
| rare | ||||||||||
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Gastropoda
- Neogastropoda
- Terebridae
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Terebra (Strioterebrum) waltonensis
Gardner 1947
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| recombined as Strioterebrum waltonensis | ||||||||||
| rare | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Florida | County: | Walton |
| Coordinates: | 30.7° North, 86.0° West (view map) | ||||
| Paleocoordinates: | 31.0° North, 83.8° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| 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 | ||
| Age estimate: | 12.4 Ma (Sr isotope) |
Stratigraphy
| Geological group: | Alum Bluff | Formation: | Shoal River | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Shoal River Fm of the Alum Bluff, which lies between the Chipola Fm (Early Miocene) and the Chochtawatchee Fm [Early Pliocene). AGE: Early Miocene (Gardener 1947); Middle Miocene in Vokes (1990) and Portell et al. (2006), although Jones et al. (1993) reports 87Sr/86Sr ratios that yielded average age estimates of 12.4 Ma [=Serravalian]. STRATIGRAPHIC POSITION: From unknown position within formation. | |||||
Lithology and environment
| Primary lithology: | unlithified calcareous marl |
| Secondary lithology: | unlithified calcareous sandstone |
| Lithology description: marls, sands, clays, for the most part unconsolidated, in places highly calcareous | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USGS |
Metadata
| Database number: | 43009 | ||
| Authorizer: | A. Miller | Enterer: | K. Layou |
| Modifier: | A. Hendy | Research group: | GCP,marine invertebrate |
| Created: | 2004-08-09 06:35:15 | Last modified: | 2012-12-05 21:05:03 |
| Access level: | the public | Released: | 2004-08-09 06:35:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11206. | J. R. Gardner. 1947. The Molluscan Fauna of the Alum Bluff Group of Florida. United States Geological Survey Professional Paper (142A-H)1-709 [A. Miller/K. Layou/A. Hendy] |