DV 831 [Otuma Fm] (Oligocene of Peru)

Where: Peru (13.9° S, 76.3° W: paleocoordinates 16.0° S, 69.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Otuma Formation, Early/Lower Oligocene (33.9 - 28.4 Ma)

• Faulted sandstone beds rest unconformably upon the middle Eocene siltstones. The section consists of three medium beds of indurated bioclastic sandstone near the base seperated by medium-grained sandstone with fossiliferous concretions. The total section may measure about 10 m.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal sandstone and medium-grained, concretionary sandstone

• Indurated bioclastic sandstone near the base seperated by medium-grained sandstone with fossiliferous concretions.

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: quarrying,

• Identifications made by T.J. DeVires. Unknown repository.

Primary reference: T. J. DeViries. 1998. Oligocene deposition and Cenozoic sequence boundaries in the Pisco Basin (Peru). Journal of South American Earth Sciences 11(3):217-231 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 41622: authorized by Austin Hendy, entered by Austin Hendy on 18.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Probably not complete for locality. Only common and biostratigraphically important taxa listed.
Bivalvia
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Carditida - Carditidae
Cardita newelli Rivera 1957 clam
 Pholadida - Corbulidae
Corbula paracasensis Rivera 1957 clam
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella woodsi Lisson 1925 turret shell