USGS Loc. 2566 - Rock Bluff, upper bed [Chipola Fm] (Miocene of the United States)

Where: Liberty County, Florida (30.5° N, 84.9° W: paleocoordinates 30.9° N, 81.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chipola Formation (Alum Bluff Group), Burdigalian (20.4 - 16.0 Ma)

• STRATIGRAPHIC POSITION: Upper bed. AGE: Direct date from 87Sr/86Sr isotope dating of fossils from elsewhere in Chipola Fm [=Burdigalian age].

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified, calcareous marl and unlithified, calcareous sandstone

• marls, sands, clays, for the most part unconsolidated, in places highly calcareous

Size class: macrofossils

Reposited in the USGS

Primary reference: J. R. Gardner. 1947. The Molluscan Fauna of the Alum Bluff Group of Florida. United States Geological Survey Professional Paper (142A-H)1-709 [A. Miller/K. Layou/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42379: authorized by Arnold Miller, entered by Karen Layou on 28.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Cerithioidea - Turritellidae
Turritella subgrundifera
Turritella subgrundifera Dall 1892 turret shell
rare
Bivalvia
 Ostreida - Gryphaeidae
"Ostrea trigonalis" = Gigantostrea trigonalis
"Ostrea trigonalis" = Gigantostrea trigonalis Conrad 1854 oyster
rare; ? in occurrence table
 Ostreida - Ostreidae
Ostrea normalis
Ostrea normalis Gardner 1926 oyster
present
 Pectinida - Anomiidae
Pododesmus scopelus
Pododesmus scopelus scallop
common
 Pectinida - Pectinoidae
"Pecten (Chlamys) acanikos" = Lindapecten acanikos
"Pecten (Chlamys) acanikos" = Lindapecten acanikos Gardner 1926 scallop
present