Gateway to the Paleobiology Database
Río Roble (Cretaceous of Argentina)

Where: Santa Cruz, Argentina (48.0° S, 72.0° W: paleocoordinates 48.0° S, 35.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hatchericeras patagonense ammonoid zone, Río Belgrano Formation, Early/Lower Barremian (130.0 - 125.5 Ma)

• Early-Middle Barremian based upon ammonoids

• bed-level stratigraphic resolution

Environment/lithology: coastal; concretionary sandstone

• "A series of transgressive and regressive cycles from the Pacific sea characterises a retroarc basin where important accumulations of continental and marine deposits are recorded during the Cretaceous" "The green sandstones of the Río Belgrano Formation show the beginning of the marine regression in the area. Facies indicate the transition to a littoral near coast high energy environmental. The pterosaur remains were found in a near-shore environment, which to the top shows an even higher energy facies that finally changes to fluviatile continental facies."
• "Green sandstones with parallel bedding, organised in coarsening up sequences, with green brownish shales at the base. Epidiagenetic red sandy concretions are common a few meters above the contact with the underlying Río Mayer Formation. Ammonoids, crustacean decapods and the pterosaur bones were found at this level"

Size class: macrofossils

Reposited in the MACN

Primary reference: L. Codorniú and Z. Gasparini. 2007. Pterosauria. In Z. Gasparini, L. Salgado, R. A. Coria (eds.), Patagonian Mesozoic Reptiles. Indiana University Press, Bloomington, IN 143-166 [R. Butler/R. Butler] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 92232: authorized by Richard Butler, entered by Richard Butler on 04.11.2009

Creative Commons license: CC BY (attribution)