Clarkton - Duplin Formation (Pliocene of the United States)

Where: Bladen County, North Carolina (34.5° N, 79.1° W: paleocoordinates 34.6° N, 78.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Duplin Formation, Late/Upper Pliocene (3.6 - 2.6 Ma)

• No lithostratigraphic details or stratigraphic relationships provided in text. From Siple (1957) "The Duplin in South Carolina is considered to be equivalent to the upper Yorktown of Virginia and the Cancellaria biofacies within the Choctawhatchee stage of Florida." AGE: Late Pliocene. Campbell (1974) suggested an age of zone N-20, or about 3.0-3.5 Ma for the type section of the Duplin Fm at Natural Well, late Pliocene age.

• formation-level stratigraphic resolution

Environment/lithology: coastal; unlithified, medium-grained, coarse, shelly/skeletal, gray, blue, calcareous sandstone

• No geologic or paleoenvironmental data reported in text.
• Shelly, medium- to coarse-grained sand, sandy marl, and limestone, bluish gray.

Size class: macrofossils

Reposited in the USNM

• Collections reposited in USNM and USGS collections.

Primary reference: J. A. Gardner. 1943. Mollusca from the Miocene and Lower Pliocene of Virginia and North Carolina. Part 1. Pelecypoda. United States Geological Survey Professional Paper 199(A):1-178 [A. Miller/A. Hendy/S. Ávila]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 59311: authorized by Austin Hendy, entered by Austin Hendy on 25.03.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Gastropoda, Bivalvia and Scaphopoda. Nomenclature is somewhat antiquated but provided to species resolution and authoritative.
Bivalvia
 Cardiida - Veneridae
"Venus (Mercenaria) campechiensis" = Mercenaria campechiensis
"Venus (Mercenaria) campechiensis" = Mercenaria campechiensis Gmelin 1791 quahog
Subspecies V. (M.) campechiensis rileyi
 Carditida - Carditidae
"Glans (Pleuromeris) tridentata" = Pleuromeris tridentata
"Glans (Pleuromeris) tridentata" = Pleuromeris tridentata Say 1826 clam
Subspecies: G. (P.) tridentata decemcostata
 Arcida - Glycymerididae
Glycymeris americana Defrance 1826 clam