Juramento River (Eocene of Argentina)

Also known as Río Juramento; Provincial Route 47

Where: Salta, Argentina (25.3° S, 65.2° W: paleocoordinates 27.7° S, 55.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Upper Member (Lumbrera Formation), Lutetian (47.8 - 41.3 Ma)

• lower levels of the Upper Lumbrera Formation, 28 m above the base of the unit

•Fernicola et al. 2021: new 238U-206Pb isochron age (46.2 Ma) obtained from samples taken on various independent points across paleosol and matrix positioned at the top of the lower section of the Lumbrera Formation. The new age is consistent with the hyperthermal scheme and constrains the deposition of the lower section of the Lumbrera Fm. between 55–46.2 Ma. Subsequently, the upper sections of the Lumbrera Formation are now constrained between 46 and 40 Ma (Lutetian) (see Fernicola et al. 2021: New assemblage of cingulates)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; bioturbated, fine-grained, nodular, red siltstone

• red fine-grained siltstones with granular bioturbation structures and carbonate nodules, which suggest paleosol development

Size class: macrofossils

Primary reference: J. E. Powell, M. J. Babot, D. A. García López, M. V. Deraco, and C. Herrera. 2011. Eocene vertebrates of northwest Argentina: annotated list. In J. Salfity, R. A. Marquillas (eds.), Cenozoic Geology of the Central Andes of Argentina 349-370 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176662: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 25.02.2016, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cingulata - Dasypodidae
Pucatherium parvum Herrera et al. 2012 armadillo