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

Also known as Gaiman locality (Fleagle 1985)

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

• coordinate estimated from map

• small collection-level geographic resolution

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"

•Busker, et al. 2019: the base of the Trelew Member in La Cantera (see Bown and Fleagle, 1993; Kay et al., 2008; Kramarz, 1998)

• 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

•Busker, et al. 2019: deposit of friable tuff above the nodular calcrete

• 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

• Vizcaino 1994: specimen 11753 is deposited in the Vertebrate Paleontology collection of the Argentine Museum of Natural Sciences "Bernardino Rivadavia" of Buenos Aires

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, Evangelos Vlachos and Miranta Kouvari

Creative Commons license: CC BY (attribution)