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Río de los Tarros tracksite (Triassic of Argentina)

Where: La Rioja, Argentina (29.9° S, 68.0° W: paleocoordinates 39.1° S, 31.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Los Colorados Formation (Agua de la Peña Group), Norian (221.5 - 205.6 Ma)

• "upper levels" of the formation; formation is considered to be latest Triassic in age

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; fine-grained, red sandstone

• "The sequence was interpreted as deposited by moderately sinuous fluvial systems, which laterally interfinger with and grade into horizontally bedded flood-plain deposits. To the top of the sequence, thin-bedded sandstones and siltstones dominate and were deposited in ponds and as crevasse splays in overbank settings" (Arcucci et al. 2004)
• "fine-grained reddish sandstone"

Size class: macrofossils

Preservation: mold/impression, trace

Collected by J. Bonaparte in 1964

Collection methods: quarrying,

• also includes "invertebrate trace fossils" that are not described

Primary reference: A. B. Arcucci, C. A. Marsicano, and A. T. Caselli. 2004. Tetrapod association and palaeoenvironment of the Los Colorados Formation (Argentina): a significant sample from western Gondwana at the end of the Triassic. Géobios 37:557-568 [M. Carrano/M. Carrano/J. Alroy] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48723: authorized by Matthew Carrano, entered by Matthew Carrano on 30.03.2005

Creative Commons license: CC BY (attribution)