Gateway to the Paleobiology Database
CTA-61 (Oligocene of Peru)

Also known as Contamana; CTA 61

Where: Loreto, Peru (7.4° S, 75.0° W: paleocoordinates 8.9° S, 69.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: base Member (Chambira Formation), Late/Upper Oligocene (28.4 - 23.0 Ma)

• 15 m above the base of the Chambira Formation; 4 m above a tuffaceous bed (CTA-08SA), dated at 26.56 +- 0.07 Ma (Late Oligocene; Deseadan SALMA) by radiometric U–Pb analyses performed on detrital zircon grains

• bed-level stratigraphic resolution

Environment/lithology: "channel"; pebbly, intraclastic, sandy conglomerate

• channelized conglomerate characterized by sharp quartz pebbles and multicoloured volcanic/metamorphic clasts included in a sandy matrix

Size class: mesofossils

Primary reference: P. Antoine, M. A. Abello, S. Adnet, A. J. Altamirano Sierra, P. Baby, G. Billet, M. Boivin, Y. Calderón, A. Candela, J. Chabain, F. Corfu, D. A. Croft, M. Ganerød, C. Jaramillo, S. Klaus, L. Marivaux, R. E. Navarrete, M. J. Orliac, F. Parra, M. E. Pérez, F. Pujos, J. Rage, and A. R. 2016. A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru. Gondwana Research 31:30-59 [J. Zijlstra/J. Zijlstra/P. Mannion] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 176147: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 29.01.2016, edited by Philip Mannion

Creative Commons license: CC BY (attribution)