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Southern Cliff of lower Chubut River Valley, near Gaiman (Miocene of Argentina)

Where: Chubut, Argentina (43.3° S, 65.5° W: paleocoordinates 43.9° S, 59.7° W)

• coordinate estimated from map

When: Trelew Member (Sarmiento Formation), Colhuehuapian (21.0 - 17.5 Ma)

• JA: originally entered as early Miocene but Colhuehuapian according to Kay et al. 2008, who also state that the terrestrial fossils are from "just above the Bryn Gwyn Member"

• group of beds-level stratigraphic resolution

Environment/lithology: paralic; lithified, concretionary, tuffaceous, sandy mudstone

• JA: originally entered by Head as terrestrial indet. with no comment; Simpson (1941, p. 14) clearly identifies the Gaiman mammals as being from "littoral" (paralic) marine deposits but Kay et al. (2008) indicate that the beds are terrestrial and the marine fossils are from an overlying bed
• JA: shown in a column as being from a tuffaceous sandy mudstone that includes calcium carbonate concretions by Kay et al. (2008); lithified based on preservation of monkey skull illustrated by Kay et al. (2008)

Size classes: macrofossils, mesofossils

Reposited in the MACN

Primary reference: A. M. Albino. 1996. Snakes from the Miocene of Patagonia (Argentina) Part I: The Booidea. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen 199(3):417-434 [J. Head/J. Head] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27311: authorized by Jason Head, entered by Jason Head on 01.12.2002, edited by Mark Uhen, Juan Carrillo, Jelle Zijlstra, Philip Mannion and Evangelos Vlachos

Creative Commons license: CC BY (attribution)