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 43009: authorized by Arnold Miller, entered by Karen Layou on 09.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Sinum waltonense, "Polinices (Neverita) eucallosus" = Neverita, "Polinices judsoni" = Natica judsoni
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Busycon dasum n. sp.
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"Uzita waltonensis" = Nassarius (Uzita) waltonensis
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"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis
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"Agladrillia empera" = Clathrodrillia empera
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"Architectonica quadriseriata" = Architectonica nobilis
"Architectonica quadriseriata" = Architectonica nobilis Röding 1798 sundial rare; A. quadriseriata waltonensis
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Bivalvia | |
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"Corbula waltonensis" = Varicorbula disparilis
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"Spisula (Hemimactra) valhosierr" = Leptomactra valhosierr
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"Phacoides (Pseudomiltha) paranodonta" = Pseudomiltha, "Phacoides (Parvilucina) vaughani" = Parvilucina
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"Arca (Diluvarca) waltonia" = Anadara (Diluvarca)
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"Glycymeris waltonensis" = Costaglycymeris waltonensis
"Glycymeris waltonensis" = Costaglycymeris waltonensis Gardner 1947 clam rare; ? in occurrence table
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