Cerro Chachahuén (Cretaceous of Argentina)

Where: Mendoza, Argentina (37.1° S, 68.9° W: paleocoordinates 36.5° S, 32.9° W)

• coordinate stated in text

When: Spitidiscus riccardii ammonoid zone, Agua de la Mula Member (Agrio Formation), Late/Upper Hauterivian (136.4 - 130.0 Ma)

• The Agrio Formation is exposed nearby Puesto Ojos de Agua south of Cerro Corrales and reaches more than 100 m. The succession, disturbed by Miocene andesitic sills, starts in the uppermost Pil- matué Member. The Avilé Member is not developed.

Environment/lithology: marine; limestone

Size class: macrofossils

Preservation: mold/impression

Collected by M.B. Aguirre Urreta

Primary reference: P. F. Rawson and M. B. Aguirre-Urreta. 2012. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: The Hauterivian genus Spitidiscus. Cretaceous Research 33:97-105 [J. Alroy/J. Martinelli]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 135510: authorized by John Alroy, entered by Julieta Martinelli on 27.10.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Holcodiscidae
Spitidiscus sp. Kilian 1910 ammonite