Arroyo Seco, Cerro Guillermo (upper) (Cretaceous to of Argentina)

Where: Mendoza, Argentina (37.1° S, 69.4° W: paleocoordinates 42.4° S, 49.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Plottier Formation (Neuquén Group), Late/Upper Coniacian to Late/Upper Coniacian (89.3 - 83.5 Ma)

• formation is now a subgroup containing 2 formations: "upper section of the Río Neuquén Formation" corresponds to the Plottier Formation within the Río Neuquén Subgroup.

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; volcaniclastic, green sandstone and gray, red mudstone

• "overbank deposits associated with sandy fluvial channels developed on a huge muddy flood plain"; specifically a "proximal overbank" facies
• "The fossil-rich level is composed of greenish (10YR 7/2), mica-rich, feldspathic wackes interbedded with mottled red (2.5 YR 4/4) and gray shales."

Size class: macrofossils

Collection methods: quarrying, mechanical,

Primary reference: B. J. González Riga and R. A. Astini. 2007. Preservation of large titanosaur sauropods in overbank fluvial facies: a case study in the Cretaceous of Argentina. Journal of South American Earth Sciences 23:290-303 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73488: authorized by Matthew Carrano, entered by Matthew Carrano on 18.06.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia -
Titanosauria indet.
Titanosauria indet. Bonaparte and Coria 1993 sauropod
 Testudines - Chelidae
Chelidae indet.
Chelidae indet. Gray 1825 sideneck turtle