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 43011: authorized by Arnold Miller, entered by Karen Layou on 09.08.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
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Gastropoda | |
"Crucibulum constrictum" = Crucibulum (Dispotaea) constrictum
"Crucibulum constrictum" = Crucibulum (Dispotaea) constrictum Conrad 1842 slipper shell present; C. constrictum conjuge
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"Polinices (Neverita) eucallosus" = Neverita, "Natica (Tectonatica) semen" = Tectonatica
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Bivalvia | |
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"Pecten (Chlamys) nicholsi" = Chlamys
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"Arca (Diluvarca) waltonia" = Anadara (Diluvarca)
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"Glycymeris subovata" = Costaglycymeris subovata
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"Corbula waltonensis" = Varicorbula disparilis, Corbula (Caryocorbula) parawhitfieldi, Corbula (Caryocorbula) seminella
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Divaricella waltonia, "Phacoides (Parvilucina) vaughani" = Parvilucina, "Phacoides (Parvilucina) flumenvadosa" = Parvilucina
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"Crassatellites (Scambula) densus" = Crassatella densus
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