A new paper:
Monodominant accumulation of hadrosaurid remains in Cerro del Pueblo Formation.
Occurrence of ?Velafrons coahuilensis and second undetermined species.
Taphonomy of bones indicates transport by viscose âflash floodâ or debris flow.
Continental setting implies age close to early Maastrichtian.
Abstract
At CaÃada Ancha, about 15 km northwest of Saltillo, northeastern Mexico, deposits of the upper Campanian-?lower Maastrichtian Cerro del Pueblo Formation exhibit bone clusters of disarticulated hadrosaurids, tentatively assigned here based on maxillary features to Velafrons coahuilensis and a second yet undetermined taxon. We discuss the taphonomy of the material as transported and buried on a delta plain. Orientation and breakage of bones as well as absence of strong abrasion indicate short-distance and high-energy transport by a viscose 'flash flood' or debris flow.