USGS Loc. 5193 - Crowder's Crossing [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 42890: 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
present
 Pectinida - Pectinoidae
"Pecten (Chlamys) nicholsi" = Chlamys
"Pecten (Chlamys) nicholsi" = Chlamys scallop
present; ? in occurrence table
 Cardiida - Mactridae
"Spisula (Hemimactra) craspedota" = Spisula craspedota
"Spisula (Hemimactra) craspedota" = Spisula craspedota Gardner 1947 clam
rare
 Cardiida - Veneridae
"Chione (Lirophora) funiakensis" = Lirophora (Panchione) funiakensis, Dosinia (Dosinidia) dalli n. sp.
"Chione (Lirophora) funiakensis" = Lirophora (Panchione) funiakensis Gardner 1947 venus clam
present
Dosinia (Dosinidia) dalli n. sp. Gardner 1947 venus clam
common
 Cardiida - Cardiidae
"Cardium (Cerastoderma) taphrium" = Dinocardium taphrium
"Cardium (Cerastoderma) taphrium" = Dinocardium taphrium Dall 1900 cockle
present
 Lucinida - Lucinidae
"Lucina santarosana" = Pegophysema santarosana, "Phacoides (Pseudomiltha) paranodonta" = Pseudomiltha
"Lucina santarosana" = Pegophysema santarosana Dall 1903 clam
rare
"Phacoides (Pseudomiltha) paranodonta" = Pseudomiltha clam
rare
Gastropoda
 Cephalaspidea - Bullidae
Bulla striata BruguiƩre 1792 snail
rare; B. striata waltonensis
 Neogastropoda - Olividae
"Oliva liodes" = Oliva (Omogymna) liodes
"Oliva liodes" = Oliva (Omogymna) liodes Dall 1903 olive snail
rare; O. liodes waltoniana
 Neogastropoda - Melongenidae
Busycon aldrichi Gardner 1947 whelk
rare
 Naticoidea - Naticidae
"Polinices (Neverita) chipolanus" = Neverita chipolanus
"Polinices (Neverita) chipolanus" = Neverita chipolanus Dall 1892 moon snail
rare; ? in occurrence table
 Calyptraeoidea - Calyptraeidae
"Crucibulum waltonense" = Crucibulum (Dispotaea) waltonense Gardner 1947 slipper shell
rare
Crucibulum multilineatum Conrad 1842 slipper shell
rare