ammonites
Las Aucas 1 (Cretaceous of Argentina)

Where: Mendoza, Argentina (34.7° S, 69.6° W: paleocoordinates 36.9° S, 57.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Jaguel Formation (Malargue Group), Late/Upper Maastrichtian (70.6 - 65.5 Ma)

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified siltstone

• marine siltstone and claystone

Size class: mesofossils

Primary reference: S. Casadio, M. Griffin, and A. Parras. 2005. Camptonectes and Plicatula (Bivalvia, Pteriomorphia) from the Upper Maastrichtian of northrern Patagonia: palaeobiogeographic implications. Cretaceous Research 26:507-524 [J. Sessa/L. Eccles] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 110471: authorized by Jocelyn Sessa, entered by Laurie Eccles on 09.06.2011