ruta 26, Los Colorados (Triassic of Argentina)

Also known as La Esquina

Where: La Rioja, Argentina (29.8° S, 67.9° W: paleocoordinates 38.9° S, 31.4° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Los Colorados Formation (Agua de la Peña Group), Norian (228.0 - 208.5 Ma)

• highest levels of formation; formation is considered to be latest Triassic in age

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; 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)

Size class: macrofossils

Collected by J. Bonaparte in 1962

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: J. F. Bonaparte. 1969. Dos nuevas "faunas" de reptiles triasicos de Argentina [Two new reptilian "faunas" of the Argentine Triassic]. Gondwana Stratigraphy (IUGS Symposium, Buenos Aires) 2:283-306 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52032: authorized by Matthew Carrano, entered by Matthew Carrano on 12.07.2005, edited by Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia -
Prosauropoda indet.2
Prosauropoda indet.2 prosauropod
PVL 3663
 Saurischia - Massospondylidae
Coloradisaurus brevis1
Coloradisaurus brevis1 Bonaparte 1978 sauropodomorph
PVL 5904, a partially articulated postcranial skeleton
 Saurischia - Riojasauridae
Riojasaurus incertus n. gen. n. sp.
Riojasaurus incertus n. gen. n. sp. Bonaparte 1969 sauropodomorph
PVL 3808
1Apaldetti et al. 2013; 2Weishampel et al. 2004