Cascada de la Ruta 3 (Pliocene of Argentina)

Also known as CR3

Where: Buenos Aires, Argentina (38.6° S, 60.6° W: paleocoordinates 38.7° S, 59.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Irene Formation, Montehermosan (5.0 - 3.8 Ma)

• da Grande (¼Cascada Cifuentes of this paper) exposures. Later, the oldest deposits were grouped into the Irene “Formation” and assigned to the Upper Pliocene (Montehermosan) (Reig, 1955).

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; conglomerate

• The accumulation ofthe AUB started with an erosive surface and was followed by deposition of Gt or Ss facies, which indicates the occurrence of a high-energy, erosive episode.

•In general, the AUB deposits record a repetitive pattern of destruction-generation of accommodation space, as recorded by the vertical succession of AE1 deposits, OV deposits and AE1 deposits once again. When compared to AUA, it could be assumed that AUB was deposited during a period of more geomorphological instability, when alternating depositional and erosional processes prevailed over pedogenesis. The architectural arrangement of the Neogene deposits of the QS basin (both AUA and AUB deposits) indicates that the sedimentary record might represent the distal reaches of a distributary fluvial system (sensu Nichols and Fisher, 2007) that drained from the Ventania ranges

Size class: mesofossils

Primary reference: E. Beilinson, G. M. Gasparini, R.L. Tomassini, M.A. Zarate, C.M. Deschamps, R.W. Barendregt, and J. Rabassa. 2017. The Quequen Salado river basin: Geology and biochronostratigraphy of the Mio-Pliocene boundary in the southern Pampean plain, Argentina. Journal of South American Earth Sciences 76:362-374 [P. Mannion/M. Kouvari/M. Kouvari]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 198686: authorized by Philip Mannion, entered by Miranta Kouvari on 07.01.2019

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Cingulata - Glyptodontidae
Plohophorus figuratus
Plohophorus figuratus Ameghino 1887 glyptodon
 Notoungulata - Hegetotheriidae
Paedotherium bonaerense
Paedotherium bonaerense Ameghino 1887 notoungulate
 Carnivora - Procyonidae
Parahyaenodon argentinus
Parahyaenodon argentinus Ameghino 1904 procyonid carnivore
 Rodentia - Echimyidae
Eumysops laeviplicatus
Eumysops laeviplicatus Ameghino 1888 spiny rat
 Rodentia - Myocastoridae
Paramyocastor diligens
Paramyocastor diligens Ameghino 1888 caviomorph
 Rodentia - Ctenomyidae
Actenomys priscus
Actenomys priscus Owen 1840 caviomorph
 Rodentia - Chinchillidae
"Lagostomus incisus" = Lagostomus (Lagostomopsis) incisus
"Lagostomus incisus" = Lagostomus (Lagostomopsis) incisus Ameghino 1888 viscacha