Where: Argentina (50.3° S, 69.0° W: paleocoordinates 51.3° S, 61.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Monte Leon Formation, Aquitanian (23.0 - 20.4 Ma)

• nivel fosilífero de Monte León 2

•

•This collection had a Burdigalian-Langhian age. But:

•

•Parras et al., 2008: No isotopic data are available on the lower part of the Monte León Formation, and the only radiometric 40Ar/39Ar age of 19.33 Ma is from the top of the unit (Fleagle et al., 1995). The 87Sr/86Sr age of 23.83 and 24.12 Ma (latest Oligo- cene) drawn from top of the San Julián Formation immediately be- low its contact with the overlying Monte León Formation at Cabo Curioso, suggest that the age of the latter at the localities along the coast should lie between 24.12 and 19.33 Ma, i.e., latest Oligo- cene or more probably early Miocene (see Fig. 8).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; tuff

Size class: macrofossils

Primary reference: A. A. Tauber, C. A. Luna, and M. E. Palacios. 2005. El registro de Necrolestes patagonensis Ameghino, 1891 (Mammalia) de la Formación Santa Cruz (Mioceno), Patagonia Austral. XVI Congreso Geológico Argentino V:157-164 [P. Mannion/M. Kouvari]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 206766: authorized by Philip Mannion, entered by Miranta Kouvari on 28.11.2019

Creative Commons license: CC BY (attribution)