Warm Mineral Springs, Fort Thompson Formation, Sarasota County, southwest FL (Pleistocene of the United States)

Where: Sarasota County, Florida (27.1° N, 82.3° W: paleocoordinates 27.6° N, 82.3° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

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

• COMMENTS: The Fort Thompson Formation is given a stage age of Bradyan. AGE: Assigned Pleistocene in text, reassigned to Late Pleistocene by A. Hendy (2007).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified, fine-grained, medium, sandy marl and unlithified, gray sandstone

• four beds are described for the section, from bottom to top: (1) marl, fresh water unconsolidated, gray, with mollusks and vertebrate remains; (2) oyster marl, local lenses; (3) shell marl, marine, sandy, fine to medium grained, unconsolidated, tan, with many mollusk shells and some vertebrate fossils; (4) sand, quartz, unconsolidated, reddish brown and gray; no fossils; fossils from marine shell bed

Size class: macrofossils

Collection methods: bulk,

Primary reference: J. R. DuBar. 1962. Neogene Biostratigraphy of the Charlotte Harbor Area in Southwestern Florida. Florida Geological Survey Geological Bulletin 43 1-83 [A. Miller/K. Layou/K. Layou]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 41740: authorized by Arnold Miller, entered by Karen Layou on 20.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula plana Say 1822 slipper shell
fairly common
 Cerithioidea - Cerithiidae
Cerithium muscarum Say 1832 cerith snail
rare
 Sorbeoconcha - Strombidae
Strombus alatus Gmelin 1792 conch
rare; immature
 Neogastropoda - Olividae
Olivella mutica Say 1822 olive snail
rare; rather slender, so perhaps is O. pusilla
 Neogastropoda - Nassariidae
Nassarius bidentatus snail
rare; slender form
Nassarius sp. Duméril 1806 snail
rare
Nassarius vibex Say 1822 snail
rare
 Neogastropoda - Fasciolariidae
"Fasciolaria distans" = Cinctura lilium, "Fasciolaria ? apicina" = Fasciolaria (Fasciolaria) apicina
"Fasciolaria distans" = Cinctura lilium Fischer 1807 snail
rare
"Fasciolaria ? apicina" = Fasciolaria (Fasciolaria) apicina Dall 1890 tulip snail
rare; has protoconch sculpture of Caloosahatchee sp.
 Neogastropoda - Columbellidae
Anachis obesus snail
rare; A. obesus subsp?
? Anachis "sp. a" Adams and Adams 1853 snail
fairly common
 Neogastropoda - Melongenidae
Melongena corona Gmelin 1791 snail
rare
"Busycon pyrum" = Busycotypus spiratus Lamarck 1816 whelk
rare; B. pyrum subsp. a?
Busycon contrarium Conrad 1840 whelk
rare
 Neogastropoda - Terebridae
? Terebra sp. Bruguière 1789 auger snail
rare
 Neogastropoda - Marginellidae
"Marginella apicina" = Prunum apicinum
"Marginella apicina" = Prunum apicinum Menke 1828 margin shell
rare
 Sorbeoconcha - Naticidae
"Polinices duplicatus" = Neverita duplicatus
"Polinices duplicatus" = Neverita duplicatus Say 1822 moon snail
rare
 Heterostropha - Acteonidae
"Actaeon sp." = Acteon
"Actaeon sp." = Acteon Montfort 1810 snail
rare
 Heterostropha - Pyramidellidae
Turbonilla "sp. a", "Turbonilla cf. alcmena" = Turbonilla levis, "Longchaeus cf. marionae" = Pyramidella suturalis
Turbonilla "sp. a" Risso 1826 snail
rare
"Turbonilla cf. alcmena" = Turbonilla levis Adams 1850 snail
rare
"Longchaeus cf. marionae" = Pyramidella suturalis Lea 1843 snail
rare
 Opisthobranchia - Cylichnidae
"Retusa canaliculata" = Acteocina canaliculata
"Retusa canaliculata" = Acteocina canaliculata Say 1826 barrel-bubble
rare
Bivalvia
 Arcida - Arcidae
Anadara "sp. a" Gray 1847 ark
rare
"Anadara transversa" = Anadara (Larkinia) transversa Say 1822 ark
fairly common
 Pectinida - Plicatulidae
Plicatula sp. Lamarck 1801 scallop
rare
 Lucinida - Lucinidae
"Phacoides multilineatus" = Parvilucina multistriata
"Phacoides multilineatus" = Parvilucina multistriata Conrad 1841 clam
common
 Cardiida - Veneridae
Transennella cf. stimpsoni Dall 1902 venus clam
rare
Transennella conradina Dall 1884 venus clam
abundant
Parastarte triquetra Conrad 1862 venus clam
abundant; V. smithvillensis petropolitana
"Macrocallista nimbosa" = Macrocallista (Macrocallista) nimbosa Solander 1786 venus clam
rare
Anomalocardia caloosana venus clam
common
"Venus campechiensis" = Mercenaria campechiensis Gmelin 1791 quahog
rare
Chione cancellata Linnaeus 1767 venus clam
abundant
 Cardiida - Mactridae
Mulinia lateralis Say 1822 clam
common
 Cardiida - Cardiidae
Laevicardium mortoni Conrad 1831 cockle
rare
 Cardiida - Tellinidae
"Tellina sayi" = Angulus texanus Dall 1900 tellin clam
rare
Tellidora cristata Récluz 1842 tellin clam
rare
 Cardiida - Semelidae
Abra aequalis Say 1822 abra
rare
 Carditida - Carditidae
Cardita sp. Bruguière 1792 clam
rare; very close to C. arata of Caloosahatchee Marl
 Nuculida - Nuculidae
"Nucula proxima" = Nucula (Nucula) proxima
"Nucula proxima" = Nucula (Nucula) proxima Say 1820 Atlantic Nut Clam
rare
unclassified
  -
Vertebrata indet. Lamarck 1801
vertebrate fossils
Mammalia
 Perissodactyla - Equidae
Equus leidyi Hay 1913 horse
teeth