ammonites
banner
Gateway to the Paleobiology Database
Sierra del Portezuelo Norte SPN (Miocene of Argentina)

Also known as SPN

Where: Neuquén, Argentina (38.9° S, 69.5° W: paleocoordinates 39.6° S, 64.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Cerro Bandera Formation, Colhuehuapian (21.0 - 17.5 Ma)

• the fossil- bearing deposits of the Cerro Bandera Formation correlate with the Lower Faunal Zone in the Colhue Huapi Member of the Sarmiento Formation at Gran Barranca (south of Colhue Huapi Lake, central Patagonia), dated at 21.1–20.1 Ma (Dunn et al., 2013), the type section for the Colhuehuapian South American Land Mammal Age (SALMA).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; paleosol/pedogenic, tuffaceous volcaniclastic sediments

• In Sierra del Portezuelo Norte (Loc. SPN, Fig. 1.1) the level bearing the remains described herein is a pedogenized tuffaceous chonite (sensu Teruggi et al., 1978) with poorly preserved scarabeid nests, about 21 m from the base of the stratigraphic section exposed in the area

Size class: mesofossils

Collected in 2015; reposited in the MACN, MLP

Primary reference: A. Kramarz, A. Garrido, A. Forasiepi, M. Bond, and C. Tambussi. 2005. Estratigrafía y vertebrados (Aves y Mammalia) de la Formación Cerro Bandera, Mioceno Temprano de la Provincia del Neuquén, Argentina. Revista Geológica de Chile 32(2):273-291 [D. Croft/D. Croft] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 89029: authorized by Darin Croft, entered by Darin Croft on 29.04.2009, edited by Miranta Kouvari and Juan Carrillo

Creative Commons license: CC BY (attribution)