USGS Loc. 5195 - Shell Bluff [Shoal River Fm] (Miocene of the United States)

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

• marls, sands, clays, for the most part unconsolidated, in places highly calcareous

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 42884: authorized by Arnold Miller, entered by Karen Layou on 06.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Arcidae
"Arca (Diluvarca) waltonia" = Anadara (Diluvarca)
"Arca (Diluvarca) waltonia" = Anadara (Diluvarca) ark
rare
 Arcida - Glycymerididae
"Glycymeris waltonensis" = Costaglycymeris waltonensis
"Glycymeris waltonensis" = Costaglycymeris waltonensis Gardner 1947 clam
abundant
 Carditida - Crassatellidae
"Crassatellites (Scambula) densus" = Crassatella densus
"Crassatellites (Scambula) densus" = Crassatella densus Dall 1900 clam
rare
 Pholadida - Corbulidae
 Cardiida - Chamidae
"Pseudochama (Echinochama) arcinella" = Arcinella arcinella
"Pseudochama (Echinochama) arcinella" = Arcinella arcinella Linnaeus 1767 jewel box
rare
 Cardiida - Ungulinidae
 Cardiida - Veneridae
"Venus nannodes" = Mercenaria nannodes, "Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris
"Venus nannodes" = Mercenaria nannodes Gardner 1947 quahog
rare
"Chione (Lirophora) trimeris" = Lirophora (Lirophora) trimeris Gardner 1947 venus clam
present
 Cardiida - Cardiidae
"Cardium (Cerastoderma) taphrium" = Dinocardium taphrium, Cardium waltonianum
"Cardium (Cerastoderma) taphrium" = Dinocardium taphrium Dall 1900 cockle
rare; ? in occurrence table
Cardium waltonianum Dall 1900 cockle
present
 Pandorida - Pandoridae
"Pandora (Kennerleyia) dodona" = Pandora (Pandorella) dodona
"Pandora (Kennerleyia) dodona" = Pandora (Pandorella) dodona Dall 1903 clam
rare
 Lucinida - Lucinidae
 Protobranchia - Nuculanidae
"Leda polychoa" = Nuculana
"Leda polychoa" = Nuculana pointed nut clam
present
Gastropoda
 Neogastropoda - Olividae
"Oliva liodes" = Oliva (Omogymna) liodes
"Oliva liodes" = Oliva (Omogymna) liodes Dall 1903 olive snail
rare; O. liodes waltoniana
 Neogastropoda - Columbellidae
Strombina lissa snail
rare
 Neogastropoda - Nassariidae
"Uzita waltonensis" = Nassarius (Uzita) waltonensis
"Uzita waltonensis" = Nassarius (Uzita) waltonensis Gardner 1936 snail
rare
 Neogastropoda - Cancellariidae
 Neogastropoda - Drilliidae
"Eumetadrillia rabdotacona" = Agladrillia (Eumetadrillia) rabdotacona
"Eumetadrillia rabdotacona" = Agladrillia (Eumetadrillia) rabdotacona Gardner 1947 snail
rare
 Neogastropoda - Conidae
Conus waltonensis Aldrich 1903 cone shell
present; C. waltonensis anodosus
 Neogastropoda - Terebridae
"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis
"Terebra (Strioterebrum) waltonensis" = Strioterebrum waltonensis Gardner 1947 auger snail
present; also T. (S.) waltonensis tribaka (rare)
 Naticoidea - Naticidae
"Polinices judsoni" = Natica judsoni, Sinum waltonense, "Polinices (Neverita) chipolanus" = Neverita chipolanus
"Polinices judsoni" = Natica judsoni Maury 1910 moon snail
rare
Sinum waltonense moon snail
rare
"Polinices (Neverita) chipolanus" = Neverita chipolanus Dall 1892 moon snail
rare
 Tonnoidea - Personidae
"Personella floridana" = Distorsio mcgintyi
"Personella floridana" = Distorsio mcgintyi Emerson and Puffer 1953 snail
rare
 Sorbeoconcha - Turritellidae
"Turritella (Torcula) waltonensis" = Torcula
"Turritella (Torcula) waltonensis" = Torcula turret shell
present
 Trochoidea - Trochidae
Calliostoma flumenvadum Gardner 1947 top snail
rare
Calliostoma rugabasis Gardner 1947 top snail
rare