F.G.S. Well 13, unit 4 [Fort Thompson Fm] (Pleistocene of the United States)

Where: Glades County, Florida (27.0° N, 81.2° W: paleocoordinates 27.0° N, 81.2° W)

• outcrop-level geographic resolution

When: Fort Thompson Formation, Late/Upper Pleistocene (0.1 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: From Fort Thompson Fm, which is in this section overlain by the Pamlico Fm (Late Pleistocene) and overlies the Caloosahatchee Fm (Early Pleistocene). AGE: Assigned to Late Pleistocene (A. Hendy, 2007). STRATIGRAPHIC POSITION: From Unit 4, a 25 ft thick shell marl.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; unlithified, medium-grained, shelly/skeletal, gray, sandy marl

• ENVIRONMENT: Shallow marine, siliciclastic.
• SPECIFIC LITHOLOGY: Shell marl, sandy quartz grains medium, subangular to rounded; loosely consolidated, dark gray, fossils well preserved and abundant. LITHIFICATION: Unlithified, based on facies description.

Size class: macrofossils

Collection methods: core,

• COLLECTOR: Florida Geological Survey, 1954. REPOSITORY: Not stated, but presumably the Florida Geological Survey.

Primary reference: J. R. DuBar. 1958. Stratigraphy and paleontology of the Late Neogene strata of the Caloosahatchee River area of southern Florida. Florida Geological Survey Bulletin 40:1-267 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 80001: authorized by Austin Hendy, entered by Austin Hendy on 31.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Reasonably modern nomenclature with species resolution assignments.
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula fornicata Linnaeus 1758 slipper shell
 Cerithioidea - Cerithiidae
Cerithium muscarum Say 1832 cerith snail
 Neogastropoda - Olividae
Olivella mutica Say 1822 olive snail
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
Nassarius vibex Say 1822 snail
 Neogastropoda - Columbellidae
Columbella rusticoides Heilprin 1887 snail
 Neogastropoda - Marginellidae
"Marginella apicina" = Prunum apicinum
"Marginella apicina" = Prunum apicinum Menke 1828 margin shell
 Sorbeoconcha - Amnicolidae
"Fontigens" sp. Pilsbry 1935 snail
 Heterostropha - Planorbidae
 Heterostropha - Pyramidellidae
"Turbonilla" sp. Risso 1826 snail
 Opisthobranchia - Cylichnidae
Acteocina canaliculata Say 1826 barrel-bubble
Bivalvia
 Cardiida - Veneridae
Gemma triquetra venus clam
"Pitar sayana" = Pitar morrhuanus Dall 1902 venus clam
"Transenella cf. conradina" = Transennella conradina Dall 1884 venus clam
"Macrocallista nimbosa" = Macrocallista (Macrocallista) nimbosa Solander 1786 venus clam
Chione cancellata Linnaeus 1767 venus clam
 Cardiida - Mactridae
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Cardiida - Cardiidae
Laevicardium mortoni Conrad 1831 cockle
Trachycardium sp. Mörch 1853 cockle
 Lucinida - Lucinidae
"Phacoides waccamawensis" = Bellucina waccamawensis, "Phacoides multilineatus" = Parvilucina multistriata, "Phacoides anodonta" = Stewartia anodonta
"Phacoides waccamawensis" = Bellucina waccamawensis Dall 1903 clam
"Phacoides multilineatus" = Parvilucina multistriata Conrad 1841 clam
"Phacoides anodonta" = Stewartia anodonta Say 1824 clam
 Carditida - Carditidae
"Cardita floridana" = Carditamera floridana
"Cardita floridana" = Carditamera floridana Conrad 1838 clam
 Mytilida - Mytilidae
Brachidontes sp. Swainson 1840 mussel
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop