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Hadrosaur tracks from Maastrichtian of Spain

From: Ben Creisler

New in PLoS ONE:

Bernat Vila, Oriol Oms, Víctor Fondevilla, Rodrigo Gaete, Àngel
Galobart, Violeta Riera & José Ignacio Canudo (2013)
The Latest Succession of Dinosaur Tracksites in Europe: Hadrosaur
Ichnology, Track Production and Palaeoenvironments.
PLoS ONE 8(9): e72579.

A comprehensive review and study of the rich dinosaur track record of
the Tremp Formation in the southern Pyrenees of Spain (Southwestern
Europe) shows a unique succession of footprint localities prior to the
end-Cretaceous mass extinction event. A description of some 30 new
tracksites and data on sedimentary environments, track occurrence and
preservation, ichnology and chronostratigraphy are provided. These new
track localities represent various facies types within a diverse set
of fluvial environments. The footprint discoveries mostly represent
hadrosaurian and, less abundantly, to sauropod dinosaurs. The
hadrosaur tracks are significantly smaller in size than, but
morphologically similar to, those of North America and Asia and are
attributable to the ichnogenus Hadrosauropodus. The track succession,
with more than 40 distinct track levels, indicates that hadrosaur
footprints in the Ibero-Armorican region occur predominantly in the
late Maaastrichtian (at least above the early Maastrichtian–late
Maastrichtian boundary). The highest abundance is found noticeably
found in the late Maastrichtian, with tracks occurring in the C29r
magnetochron, within about the latest 300,000 years of the Cretaceous.