Where: Walton County, Florida (30.7° N, 86.1° W: paleocoordinates 31.0° N, 83.4° 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 42819: authorized by Arnold Miller, entered by Karen Layou on 05.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Crassatellites (Scambula) densus" = Crassatella densus
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"Venus nannodes" = Mercenaria nannodes, "Chione (Lirophora) ceramota" = Lirophora (Lirophora) ceramota, "Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris
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"Arca (Diluvarca) waltonia" = Anadara (Diluvarca), "Arca (Diluvarca) strebla" = Anadara (Diluvarca) strebla
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Gastropoda | |
"Turritella (Torcula) waltonensis" = Torcula
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"Vexillum (Uromitra) triptum" = Uromitra
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"Terebra (Strioterebrum) spirifera" = Strioterebrum spiriferum, "Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis
"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis Gardner 1947 auger snail rare; also T. (S.) waltonensis tribaka (rare)
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"Hemipleurotoma eileta" = Gemmula vaningeni, "Polystira (Pleuroliria) tenagos" = Polystira tenagos
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"Oliva liodes" = Oliva (Omogymna) liodes
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"Strombina waltonia" = Strombina (Strombina) waltonia, Busycon dasum, "Uzita waltonensis" = Nassarius (Uzita) waltonensis
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"Polinices (Neverita) eucallosus" = Neverita, "Polinices judsoni" = Natica judsoni, Sinum waltonense
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