Cañadón Las Leoneras (Jurassic of Argentina)

Where: Chubut, Argentina (42.8° S, 69.4° W: paleocoordinates 42.5° S, 27.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Upper Member (Las Leoneras Formation), Early/Lower Pliensbachian (189.6 - 183.0 Ma)

• 42 m below top of formation and 137 m above base; lower age constraint is not well established; Late Triassic remains a possibility

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; massive, bioturbated, tuffaceous, gray, green claystone

• "initial rifting deposits, linked to the genesis of the Cañadón Asfalto Basin."
• "The Upper Member is composed of a 57.5 m thick succession of greenish gray, massive to laminated, bioturbated, slightly tuffaceous claystones. Tuff and limestone beds, 20 to 60 cm thick, are interbedded in the lower part of the Upper Member. The tuffaceous beds dominate the top of the section, with occasional conglomerates of volcanic clasts and tuffaceous matrix. This sequence is interpreted as lacustrine deposits...associated with pyroclastic (ash fall) and debris flow deposits. Dinosaur remains were recovered from this member, situated 137 m from the base of the formation."

Size class: macrofossils

Collection methods: quarrying, mechanical,

Primary reference: D. Pol, A. Garrido, and I. A. Cerda. 2011. A new sauropodomorph dinosaur from the Early Jurassic of Patagonia and the origin and evolution of the sauropod-type sacrum. PLoS One 6(1(e14572)):1-24 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 103445: authorized by Matthew Carrano, entered by Matthew Carrano on 28.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia -
Leonerasaurus taquetrensis n. gen. n. sp.
Leonerasaurus taquetrensis n. gen. n. sp. Pol et al. 2011 sauropodomorph
MPEF-PV 1663