Darwin Station (Miocene of Argentina)

Where: Argentina (39.2° S, 65.8° W: paleocoordinates 40.0° S, 59.4° W)

• coordinate estimated from map

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

• True originally described these deposits at the "Patagonian beds"; del Rio (2004) identifies them as the Monte Leon Formation and states they are early Miocene in age

•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).

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: F. W. True. 1909. A new genus of fossil cetaceans from the Santa Cruz Territory, Patagonia; and description of a mandible and vertebrae of Prosqualodon. Smithsonian Miscellaneous Collections 52:441-455 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52075: authorized by Mark Uhen, entered by Mark Uhen on 19.07.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cetacea -
"Proinia patagonica n. gen. n. sp." = Prosqualodon australis
"Proinia patagonica n. gen. n. sp." = Prosqualodon australis Lydekker 1894 toothed whale