Where: Salta, Argentina (25.6° S, 65.9° W: paleocoordinates 28.0° S, 56.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Casamayoran mammal zone, Lumbrera Formation (Salta Group), Lutetian (47.8 - 41.3 Ma)

• Powell et al., 2011: Recently, geologic and paleontologic evidence allowed the correlation of the upper levels of Lumbrera with Geste, Casa Grande, and Quebrada de los Colorados Formations. Additionally, these levels were referred to the late-middle Eocene (Casamayoran SALMA -South American Land Mammal Age-, Barrancan subage) by an U/Pb dating of 39.9 Ma . The lower levels of the Lumbrera Formation are here referred to the Vacan subage of the Casamayoran SALMA.

•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: "floodplain"; lithified, massive, bioturbated, silty sandstone and claystone

Size class: mesofossils

Primary reference: F. J. Goin, R. M. Palma, R. Pascual and J. E. Powell. 1986. Persistencia de un primitivo Borhyaenidae (Mammalia, Marsupialia) en el Eoceno temprano de Salta (Fm. Lumbrera, Argentina). Aspectos geológicos y paleoambientales relacionados. Ameghiniana 23(1-2):47-56 [C. Jaramillo/C. Suarez-Gomez/R. Butler]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 142855: authorized by Carlos Jaramillo, entered by Catalina Suarez-Gomez on 17.04.2013

Creative Commons license: CC BY (attribution)