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Colonia Orozco (Triassic of Uruguay)

Also known as Cerro Largo Localities

Where: Cerro Largo, Uruguay (32.3° S, 54.1° W: paleocoordinates 40.2° S, 15.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Buena Vista Formation, Late/Upper Triassic (235.0 - 201.6 Ma)

• The fossils of the collection are distributed within an interval of about 20 m. (see measured section in text-fig. in Pineiro et al., 2007).

•Although arguments have been made for a Permian age for this locality, an Early Triassic date seems more likely (see discussion in Dias-da-Silva et al. 2006).

• member-level stratigraphic resolution

Environment/lithology: fluvial; muddy, sandy siliciclastic sediments and intraclastic conglomerate

• "The paleoenvironment is related to the final withdrawal of the sea, and the upper part of this section is characterized by continental and strong fluvial influences." (Pineiro et al., 2003)

•"there is a general consensus among authors about the fluvial environmental characterization of the Buena Vista Formation" (Pineiro et al., 2007)

• "Buena Vista Formation is characterized by reddish fine sandstone interbedded with lenticular clay layers and intraformational conglomerates [...] The fossils described in this paper were recovered from the conglomerates in the middle part of the Buena Vista Formation." (Pineiro et al., 2003)

Size class: macrofossils

Collection methods: FC-DPV = Departamento de Paleontologia, Facultad de Ciencias, Montevideo, Uruguay

Primary reference: G. Pineiro, M. Verde, M. Ubilla and J. Ferigolo. 2003. First Basal Synapsids (“Pelycosaurs”) from the Upper Permian - ?Lower Triassic of Uruguay. Journal of Paleontology 77(2):389-392 [J. Mueller/T. Liebrecht] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 86401: authorized by Johannes Mueller, entered by Torsten Liebrecht on 01.02.2009, edited by Richard Butler and Graeme Lloyd

Creative Commons license: CC BY (attribution)