Where: Walton County, Florida (30.7° N, 86.0° W: paleocoordinates 31.0° N, 83.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Shoal River Formation (Alum Bluff Group), Serravallian (13.8 - 11.6 Ma)
• 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.
• bed-level stratigraphic resolution
Environment/lithology: marine; unlithified, calcareous marl and unlithified, calcareous sandstone
Size class: macrofossils
Reposited in the USGS
Primary reference: 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 43014: authorized by Arnold Miller, entered by Karen Layou on 09.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
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"Vitrinella" seminola n. sp.
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"Polinices (Neverita) eucallosus" = Neverita, "Natica (Tectonatica) semen" = Tectonatica, "Natica (Stigmaulax) guppiana" = Stigmaulax guppiana, "Polinices judsoni" = Natica judsoni, Sinum waltonense
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Kurtziella prionota, ""Mangelia" phrixae" = Cythara (Mangelia)
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Terebra (Strioterebrum) bipartita, "Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis
"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis Gardner 1947 auger snail present; T. (S.) waltonensis tribaka (present)
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"Polystira (Pleuroliria) tenagos" = Polystira tenagos
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"Eumetadrillia rabdotacona" = Agladrillia (Eumetadrillia) rabdotacona, "Crassispira calligonoides" = Crassispira (Hindsiclava) calligonoides
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"Oliva liodes" = Oliva (Omogymna) liodes
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"Uzita pedana" = Nassarius (Uzita), "Uzita nanna" = Nassarius (Uzita), "Uzita grapta" = Nassarius (Uzita), "Uzita waltonensis" = Nassarius (Uzita) waltonensis
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"Vexillum (Uromitra) triptum" = Uromitra
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Bivalvia | |
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Yoldia soror n. sp.
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"Leda polychoa" = Nuculana
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"Pecten (Chlamys) nicholsi" = Chlamys
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"Arca (Diluvarca) waltonia" = Anadara (Diluvarca), Trinacria meekii
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"Glycymeris waltonensis" = Costaglycymeris waltonensis
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Corbula (Caryocorbula) parawhitfieldi, Corbula (Caryocorbula) seminella, "Corbula waltonensis" = Varicorbula disparilis
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"Macoma (Psammacoma) torynoides" = Psammacoma torynoides
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"Alveinus micculus" = Alveinus rotundus
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"Spisula (Hemimactra) valhosierr n. sp." = Leptomactra valhosierr
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Callocardia (Agriopoma) prosayana, "Chione (Lirophora) ceramota" = Lirophora (Lirophora) ceramota, "Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris, Dosinia (Dosinidia) dalli, "Venus nannodes" = Mercenaria nannodes
"Chione (Lirophora) ceramota" = Lirophora (Lirophora) ceramota Gardner 1947 venus clam present; ? in occurrence table
"Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris Gardner 1947 venus clam present; ? in occurrence table
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"Phacoides (Parvilucina) flumenvadosa" = Parvilucina, Divaricella waltonia, "Lucina santarosana" = Pegophysema santarosana
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"Crassatellites (Scambula) densus" = Crassatella densus, "Crassatellites (Crassinella) tanicus" = Crassinella
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Scaphopoda | |
"Dentalium (Antalis) diopon" = Antalis
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