U.C. Location S. 7753 (Zone C) - Clark and Durham (1946) (Eocene of Colombia)

Also known as S. 7753

Where: Sucre, Colombia (9.5° N, 75.6° W: paleocoordinates 7.1° N, 68.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Eocene (37.2 - 33.9 Ma)

• No lithostratigraphic nomenclature for these collections. Deposits of late Eocene age, referred to as Zone C. Correlatable on the basis of faunas to the Saman Formation and Chira Shales of Peru (upper Eocene to Oligocene) and upper Jackson Formation of the Gulf Coast, USA (Bartonian). The Eocene in the Sucre region of Columbia reaches 4,500 ft in thickness, of which the collections span the upper portion of Anderson's (1928) unit F (600 ft), near the top of this succession.

• bed-level stratigraphic resolution

Environment/lithology: coastal; pebbly, gray, conglomeratic sandstone and fine-grained, shelly/skeletal, calcareous sandstone

• Deposit probably formed close to shoreline, tropical.
• Fossils from three facies: conglomeratic gray sandstone with pebbles up to a quarter inch in diameter; dark-gray, medium-fine bituminous-stained sandstone; fine calcareous shelly sandstone/coquina.

Size class: macrofossils

Reposited in the CAS, UCMP

Collection methods: quarrying,

• Collected by the Standard Oil Company of California. Held in repositories at both CAS and UCMP.

Primary reference: B. L. Clark and J. W. Durham. 1946. Eocene Faunas from the Department of Bolivar, Colombia. Geological Society of America Memoir 16:1-126 [M. Patzkowsky/K. Layou/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42837: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for mollusca (identified by B.L. Clark).
Bivalvia
 Lucinida - Thyasiridae
Thyasira olssoni Clark and Durham 1946 clam