ammonites
Chorrillo del Medio, Austral Basin, Rio Mayer Formation, Santa Cruz (Cretaceous of Argentina)

Where: Argentina (48.3° S, 72.0° W: paleocoordinates 48.3° S, 35.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Rio Mayer Formation (Pueyrredon Group), Late/Upper Barremian (130.0 - 125.5 Ma)

• upper Rio Mayer Formation

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, black shale

Size class: macrofossils

Primary reference: M. B. Aguirre-Urreta. 1989. The Cretaceous decapod Crustacea of Argentina and the Antarctic Pensinsula. Palaeontology 32(3):499-552 [W. Kiessling/U. Merkel] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66634: authorized by Wolfgang Kiessling, entered by Uta Merkel on 12.10.2006