Sixmile Creek near Orient Station [Tampa Limestone] (Oligocene to of the United States)

Also known as Mansfield station #3

Where: Hillsborough County, Florida (28.0° N, 82.4° W: paleocoordinates 28.2° N, 77.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tampa Limestone Member (Arcadia Formation), Chattian to Chattian (28.1 - 20.4 Ma)

• LITHOSTRATIGRAPHY: Formerly referred to as the Tampa Limestone. Scott et al. (2001) assign the Tampa to the rank of member and place it in the Arcadia Formation. AGE: Mansfield suggests age equivalencies (based primarily on faunal similarities) with the Chipola Fm., the Trent Marl of North Carolina, and the Anguilla Fm. of Anguilla. Placed here into the Chattian-Aquitanian on the basis of most recent chronostratigraphy.

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, white, sandy, cherty/siliceous limestone

• Sand size quartz grains and an abundance of freshwater molluscs in the Tampa Limestone indicate nearshore deposition.
• The Tampa LS member of the Arcadia Fm. is more quartz sand rich and poorer in calcium carbonate than the underlying Suwannee LS. Fossils are often preserved via silicification and can be found in fully replaced, partially replaced or unaltered states. From several localities, a buff to dirty limestone matrix is reported, speckled with quartz sand grains of medium size.

Size class: mesofossils

Preservation: cast, mold/impression, permineralized, replaced with silica

Primary reference: W. C. Mansfield. 1937. Molluscs of the Tampa and Suwannee Limestones. Geological Bulletin, State of Florida Department of Conservation 15:1-334 [A. Miller/C. Ferguson/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61051: authorized by Arnold Miller, entered by Chad Ferguson on 29.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Occurrence based data only
unclassified
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Gastropoda
 Cycloneritida - Helicinidae
 Lepetellida - Fissurellidae
Diodora ? chipolana Dall 1892 snail
 Cerithioidea - Turritellidae
Turritella atacta turret shell
Turritella tampae Heilprin 1887 turret shell
 Cerithioidea - Potamididae
 Cerithioidea - Batillariidae
 Architaenioglossa - Ampullinidae
 Sorbeoconcha - Strombidae
 Neogastropoda - Olividae
"Olivella eutorta" = Omogymna eutorta, Ancilla shepardi
"Olivella eutorta" = Omogymna eutorta Dall 1915 olive snail
Ancilla shepardi olive snail
 Neogastropoda - Nassariidae
"Alectrion ethelinda" = Nassarius (Alectrion)
"Alectrion ethelinda" = Nassarius (Alectrion) snail
 Neogastropoda - Melongenidae
Busycon tampaense whelk
subspecies: perizonatum
 Neogastropoda - Conidae
Conus iliolus cone shell
Conus planiceps Heilprin 1887 cone shell
 Neogastropoda - Costellariidae
Conomitra angulata ribbed mitre
 Neogastropoda - Marginellidae
 Neogastropoda - Muricidae
"Rapana tampaensis" = Ecphora tampaensis Dall 1890 murex snail
 Neogastropoda - Volutidae
 Sorbeoconcha - Cypraeidae
"Cypraea tumulus" = Zonaria tumulus
"Cypraea tumulus" = Zonaria tumulus Heilprin 1886 cowry
 Stylommatophora - Bulimulidae
"Bulimulus (Hyperaulax) americanus" = Tocobaga americanus
"Bulimulus (Hyperaulax) americanus" = Tocobaga americanus Heilprin 1886 slug
 Stylommatophora - Camaenidae
 Neritoidea - Neritidae
Bivalvia
 Arcida - Arcidae
"Arca (Arca) umbonata" = Lamarcka imbricata Bruguière 1789 clam
 Arcida - Glycymerididae
"Glycymeris lamyi" = Tucetona lamyi
"Glycymeris lamyi" = Tucetona lamyi Dall 1915 clam
 Pectinida - Pectinoidae
"Chlamys (Lyropecten) burnetti" = Lyropecten, Chlamys (Chlamys) crocus
"Chlamys (Lyropecten) burnetti" = Lyropecten scallop
 Mytilida - Mytilidae
"Modiolus (Botula) cinnamomeus" = Botula cinnamomeus, Modiolus blandus
"Modiolus (Botula) cinnamomeus" = Botula cinnamomeus Lamarck 1819 mussel
 Lucinida - Lucinidae
"Phacoides (Miltha) hillsboroensis" = Miltha hillsboroensis, Phacoides (Linga) wacissanus
"Phacoides (Miltha) hillsboroensis" = Miltha hillsboroensis Heilprin 1887 clam
 Cardiida - Cyrenidae
 Cardiida - Chamidae
 Cardiida - Veneridae
"Macrocallista (Paradione) floridana" = Pitar (Paradione), Callocardia (Agriopoma) ? nux, "Chione (Chamelea) ? rhodia" = Chamelea, Anomalocardia penita, Venus halidona, "Antigona (Artena) glyptoconcha" = Artena, "Antigona (Artena) shepardi" = Artena
"Macrocallista (Paradione) floridana" = Pitar (Paradione) venus clam
"Chione (Chamelea) ? rhodia" = Chamelea venus clam
Venus halidona venus clam
"Antigona (Artena) glyptoconcha" = Artena venus clam
"Antigona (Artena) shepardi" = Artena venus clam
 Cardiida - Cardiidae
"Cardium (Trachycardium) phlyctaena" = Trachycardium (Dallocardia) phlyctaena Dall 1900 cockle
 Cardiida - Tellinidae
"Tellina (? Merisca) merula" = Merisca, "Tellina (Merisca) halidona" = Merisca
"Tellina (? Merisca) merula" = Merisca tellin clam
"Tellina (Merisca) halidona" = Merisca tellin clam
 Hiatellida - Hiatellidae
"Panope aff. goldfussil" = Panopea
"Panope aff. goldfussil" = Panopea clam
 Carditida - Carditidae
"Venericardia serricosta" = Venericardia (Glyptoactis) serricosta Heilprin 1887 clam
 Nuculanida - Yoldiidae
 Ichnofossils - Celliformidae
Celliforma nuda Brown 1935
Cerion
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