USGS Loc. 10658 - 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 42872: authorized by Arnold Miller, entered by Karen Layou on 06.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Arcidae
"Arca (Diluvarca) waltonia" = Anadara (Diluvarca)
"Arca (Diluvarca) waltonia" = Anadara (Diluvarca) ark
 Carditida - Crassatellidae
"Crassatellites (Crassinella) tanicus" = Crassinella
"Crassatellites (Crassinella) tanicus" = Crassinella clam
 Pholadida - Corbulidae
 Cardiida - Kelliidae
Bornia dodona clam
 Cardiida - Chamidae
"Pseudochama (Echinochama) arcinella" = Arcinella arcinella
"Pseudochama (Echinochama) arcinella" = Arcinella arcinella Linnaeus 1767 jewel box
 Cardiida - Tellinidae
Tellina (Moerella) piesa, "Macoma (Psammacoma) torynoides" = Psammacoma torynoides
Tellina (Moerella) piesa Gardner 1947 tellin clam
"Macoma (Psammacoma) torynoides" = Psammacoma torynoides Gardner 1947 tellin clam
 Cardiida - Cardiidae
Cardium (Cerastoderma) waltonianum Dall 1900 cockle
 Lucinida - Lucinidae
"Phacoides (Parvilucina) vaughani" = Parvilucina, "Lucina santarosana" = Pegophysema santarosana, Divaricella waltonia
"Phacoides (Parvilucina) vaughani" = Parvilucina clam
"Lucina santarosana" = Pegophysema santarosana Dall 1903 clam
 Nuculida - Nuculidae
Nucula chipolana nut clam
rare; N. chipolana waltonia
 Protobranchia - Nuculanidae
"Leda polychoa" = Nuculana
"Leda polychoa" = Nuculana pointed nut clam
 Naticoidea - Naticidae
"Polinices judsoni" = Natica judsoni, "Polinices (Neverita) eucallosus" = Neverita
"Polinices judsoni" = Natica judsoni Maury 1910 moon snail
"Polinices (Neverita) eucallosus" = Neverita moon snail
 Calyptraeoidea - Calyptraeidae
Calyptraea centralis Conrad 1841 slipper shell