Valle Pintado (upper), coprolites (Triassic of Argentina)

Where: San Juan, Argentina (30.1° S, 67.9° W: paleocoordinates 46.8° S, 33.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Scaphonyx-Exaeretodon-Herrerasaurus other zone, Ischigualasto Formation, Carnian (237.0 - 228.0 Ma)

• three closely stacked beds 74 m above base of formation (Hollocher et al. 2005). This would place them within the "Scaphonyx-Exaeretodon-Herrerasaurus biozone" of Martinez et al. (2011: Science 331: 206) which reportedly represents "a narrow temporal interval from 231.5 to 229 Ma in the latter half of the Carnian stage".

• group of beds-level stratigraphic resolution

Environment/lithology: dry floodplain; paleosol/pedogenic mudstone and bioturbated, paleosol/pedogenic siltstone

• "a series of flood-plain and overbank deposits indicative of low-energy fluvial transport and an arid or semiarid climate."
• layers described as "protosol", "proto-vertisol", and "calcicsol"; layers are reduced (i.e. gray, dark brown, green or black) silstone and mudstone layers, with root traces, ripple lamination, and slickensides.

Size class: macrofossils

Preservation: trace, replaced with calcite, coprolite

Collection methods: peel or thin section,

Primary reference: K. T. Hollocher, O. A. Alcober, C. E. Colombi and T. C. Hollocher. 2005. Carnivore coprolites from the Upper Triassic Ischigualasto Formation, Argentina: chemistry, mineralogy, and evidence for rapid initial mineralization. Palaios 20(1):51-63 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 47036: authorized by Matthew Carrano, entered by Matthew Carrano on 01.02.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Herrerasauridae
Herrerasaurus sp.
Herrerasaurus sp. Reig 1963 herrerasaurid
 Rhynchosauria - Rhynchosauridae
Scaphonyx sp.
Scaphonyx sp. Woodward 1907 rhynchosaur