Where: Salta, Argentina (25.5° S, 65.5° W: paleocoordinates 28.0° S, 56.0° W)

• coordinate estimated from map

• local area-level geographic resolution

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

• Upper unit of Santa Barbara subgroup of Salta Group

•

•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)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; peloidal, red mudstone and red sandstone

Size class: macrofossils

Primary reference: M. Bond and M. G. Vucetich. 1983. Indalecia grandensis gen. et sp. nov. del Eoceno temprano del noroeste Argentino, tipo de una nueva subfamilia de los Adianthidae (Mammalia, Litopterna). Asociacion Geologica Argentino, Revista 38(1):107-117 [J. Alroy/J. Wertheim/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13775: authorized by John Alroy, entered by Jill Wertheim on 25.04.2002, edited by Darin Croft, Philip Mannion, Richard Butler, Jelle Zijlstra and Grace Varnham

Creative Commons license: CC BY (attribution)