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 42874: authorized by Arnold Miller, entered by Karen Layou on 06.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
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"Crucibulum constrictum" = Crucibulum (Dispotaea) constrictum
"Crucibulum constrictum" = Crucibulum (Dispotaea) constrictum Conrad 1842 slipper shell rare; C. constrictum conjuge
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"Turritella (Torcula) waltonensis" = Torcula, Turritella segmenta
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"Oliva liodes" = Oliva (Omogymna) liodes
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"Uzita waltonensis" = Nassarius (Uzita) waltonensis
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"Strombina waltonia" = Strombina (Strombina) waltonia
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"Eumetadrillia rabdotacona" = Agladrillia (Eumetadrillia) rabdotacona
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"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis
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"Hemipleurotoma eileta" = Gemmula vaningeni, "Polystira (Pleuroliria) tenagos" = Polystira tenagos
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"Natica (Stigmaulax) guppiana" = Stigmaulax guppiana
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Bivalvia | |
"Arca (Diluvarca) waltonia" = Anadara (Diluvarca)
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"Glycymeris waltonensis" = Costaglycymeris waltonensis
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Pitaria waltonensis, "Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris, "Venus nannodes" = Mercenaria nannodes
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Cardium waltonianum, "Cardium (Cerastoderma) taphrium" = Dinocardium taphrium, "Cardium (Trachycardium) plectopleura" = Trachycardium
"Cardium (Cerastoderma) taphrium" = Dinocardium taphrium Dall 1900 cockle rare; ? in occurrence table
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"Crassatellites (Scambula) densus" = Crassatella densus
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