Well 9b Hendry County (Pleistocene of the United States)

Where: Hendry County, Florida (26.7° N, 81.0° W: paleocoordinates 26.7° N, 80.6° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Caloosahatchee Formation, Early/Lower Pleistocene (2.6 - 0.8 Ma)

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

•4 ft above 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; gray, white, silty, sandy marl

• The Caloosahatchee marl consists predominantly of shells, sand, and silt. Fresh unweathered exposures are generally pale cream-colored to light gray, although green clay marls have been included in the formation. The sand and shell variations of the Caloosahatchee marl can be separated from the marine formations of Pleistocene age only by identification of the mollusk faunas.

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 75003: authorized by Arnold Miller, entered by Kate Bulinski on 13.09.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Ostreidae
"Ostrea sculpturata" = Conradostrea sculpturata
"Ostrea sculpturata" = Conradostrea sculpturata Conrad 1840 oyster
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
 Arcida - Arcidae
"Anadara transversa" = Anadara (Larkinia) transversa
"Anadara transversa" = Anadara (Larkinia) transversa Say 1822 ark
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Cardiida - Mactridae
Mulinia cf. lateralis Say 1822 clam
 Cardiida - Veneridae
Dosinia sp. Scopoli 1777 venus clam
 Lucinida - Lucinidae
Gastropoda
 Neogastropoda - Marginellidae
Marginella sp. Lamarck 1799 margin shell