Well 42b Dade County (Pliocene of the United States)

Where: Dade County, Florida (25.8° N, 80.9° W: paleocoordinates 25.9° N, 80.0° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Tamiami Formation, Pliocene (5.3 - 2.6 Ma)

• Determined from cores from test wells drilled by US Corps of Engineers in 1950

•12-16 ft below sea level

•Age determination revised in more recent papers (see Lithostratigraphy, Petrography,

•Biostratigraphy, and Strontium-Isotope

•Stratigraphy of the Surficial Aquifer System

•of Western Collier County, Florida, Edwards et al., 1998, USGS Open-File Report 98-205)

• formation-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal, silty, sandy marl

• Changes laterally from shelly marl to soft silty limestone to the silty sand and clayey marl

Size class: mesofossils

Collection methods: core

• observed from cores

Primary reference: M. C. Schroeder and H. Klein. 1954. Geology of the Western Everglades Area, Southern Florida. United States Geological Survey Circular 314 [A. Miller/K. Bulinski/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 75023: authorized by Arnold Miller, entered by Kate Bulinski on 13.09.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
"Glycymeris subovata" = Costaglycymeris subovata
"Glycymeris subovata" = Costaglycymeris subovata Say 1824 clam
 Ostreida - Ostreidae
"Ostrea sculpturata" = Conradostrea sculpturata
"Ostrea sculpturata" = Conradostrea sculpturata Conrad 1840 oyster
 Carditida - Carditidae
 Cardiida - Veneridae
"Transenella sp." = Transennella, Macrocallista sp.
"Transenella sp." = Transennella Dall 1884 venus clam
Macrocallista sp. Meek 1876 venus clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) isocardia" = Trachycardium (Trachycardium) isocardia
"Cardium (Trachycardium) isocardia" = Trachycardium (Trachycardium) isocardia Linnaeus 1758 cockle
 Lucinida - Lucinidae
"Divaricella cf. quadrisulcata" = Divalinga quadrisulcata, "Phacoides (Cardiolucina) trisulcatus" = Cavilinga trisulcata
"Divaricella cf. quadrisulcata" = Divalinga quadrisulcata d'Orbigny 1846 clam
"Phacoides (Cardiolucina) trisulcatus" = Cavilinga trisulcata Conrad 1841 clam
subspecies multistriatus
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella cookei turret shell
subspecies gladeensis
 Trochoidea - Trochidae
"Omphalius exoletus" = Chlorostoma (Omphalius)
"Omphalius exoletus" = Chlorostoma (Omphalius) top snail