Aspalaga Bluff (A) [Tampa Limestone] (Oligocene to of the United States)

Also known as Mansfield locality #20

Where: Gadsden County, Florida (30.6° N, 84.9° W: paleocoordinates 30.9° N, 80.0° 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 61107: 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
  -
Gastropoda
 Cerithioidea - Cerithiidae
 Cerithioidea - Potamididae
 Architaenioglossa - Ampullinidae
 Neogastropoda - Costellariidae
Conomitra angulata ribbed mitre
Bivalvia
 Mytilida - Mytilidae
"Modiolus (Botula) cinnamomeus" = Botula cinnamomeus, Lithophaga antillarum
"Modiolus (Botula) cinnamomeus" = Botula cinnamomeus Lamarck 1819 mussel
Lithophaga antillarum d'Orbigny 1853 mussel
 Cardiida - Cyrenidae
 Cardiida - Veneridae