Overpass Rep 2 (Eocene of the United States)

Also known as Locality ADa-1 of Toulmin, 1977

Where: Dale County, Alabama (31.5° N, 85.6° W: paleocoordinates 33.2° N, 71.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Bashi Member (Hatchetigbee Bluff Formation), Ypresian (56.0 - 47.8 Ma)

• rep 1 is 1m above Rep 2

•Rep 3 is 1 m laterally from rep 1

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; unlithified, gray, muddy sandstone

• unlithified gray clay rich sand

Size class: mesofossils

Collection methods: bulk, sieve,

• Gastropod shells were only counted if they contained the apex of the shell; bivalve shells were only counted if they contained the umbo.

Primary reference: J. A. Sessa, T. J. Bralower, M. E. Patzkowsky, J. C. Handley, and L. C. Ivany. 2012. Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain. Paleobiology 38(2):218-239 [M. Patzkowsky/J. Sessa/J. Sessa]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 90147: authorized by Jocelyn Sessa, entered by Laurie Eccles on 08.07.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Nuculanidae
"Calorhadia pharcida" = Calorhadia (Calorhadia) pharcida
"Calorhadia pharcida" = Calorhadia (Calorhadia) pharcida Dall 1898 pointed nut clam
 Lucinida - Lucinidae
Epilucina sp. Dall 1901 clam
Linga pomilia Conrad 1833 clam
Linga pomilia smithi
 Cardiida - Veneridae
 Cardiida - Tellinidae
 Pholadida - Corbulidae
Vokesula aldrichi Meyer 1885 clam
 Carditida - Carditidae
Venericardia indet. Lamarck 1801 clam
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
 Dentaliida - Dentaliidae
Dentalium microstria Heilprin 1880 tusk shell
Gastropoda
 Cerithioidea - Turritellidae
Turritella gilberti turret shell
 Neogastropoda - Buccinidae
Pseudoliva vetusta Conrad 1833 true whelk
Pseudoliva vetusta forma
 Neogastropoda - Raphitomidae