Also known as Contamana; CTA 29

Where: Loreto, Peru (7.3° S, 74.9° W: paleocoordinates 9.1° S, 69.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: lower Member (Pozo Formation), Rupelian to Rupelian (33.9 - 23.0 Ma)

• early Barrancan SALMA based on mammalian biochronology

•

•Campbell et al. (2021). Our analyses correctly predicted that Pozomys ucayaliensis from CTA-29 is younger (27.0 Ma) than the rodents from the underlying level CTA-27 (mean of 30.3 Ma) and provide an independent age estimate for CTA-29 that is ∼16.5 My younger than that provided by “biotite” grains from the same layer (presumably reworked, see Discussion) that yielded a 40Ar/39Ar date of 43.44 ± 2.5 Ma.

• bed-level stratigraphic resolution

Environment/lithology: fluvial; lithology not reported

Size class: mesofossils

Primary reference: P. Antoine, M. A. Abello, S. Adnet, A. J. A. Sierra, P. Baby, G. Billet, M. Boivin, Y. Calderón, A. Candela, J. Chabain, and F. Corfu. 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. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 176129: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 29.01.2016, edited by Philip Mannion and Kateryn Pino

Creative Commons license: CC BY (attribution)