Cerro Caicayen 1 (Cretaceous of Argentina)

Where: Argentina (39.0° S, 68.0° W: paleocoordinates 38.0° S, 31.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Agrio Formation, Valanginian (139.8 - 132.9 Ma)

• at the base of the Agrio formation at this locality

• bed-level stratigraphic resolution

Environment/lithology: marine; shale and shelly/skeletal, sandy packstone

• shale with interbedded coquina (some of it sandy, calcareous or silty) also has some calcareous nodules

Size class: macrofossils

Primary reference: M. B. Aguirre-Urreta and P. F. Rawson. 1999. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Research 20:343-357 [J. Alroy/E. Leckey/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37721: authorized by John Alroy, entered by Erin Leckey on 22.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
 Pholadomyida - Pholadomyidae
Pholadomya sp. Sowerby 1823 clam