In preparation: A dinosaur graveyard in the Late Campanian (Late Cretaceous) at Cerro de Angostura near Porvenir de Jalpa, Coahuila, northeast Mexico

In the Cañon Cerro de Angostura near the hamlet Porvenir de Jalpa, Coahuila, we discovered about ten clusters of weathered-out dinosaur bones in an area of only about 200 metres long and 30 metres wide. Sediments belong to the Cerro del Pueblo Formation and are of Late Campanian age. The bones come from articulated skeletons that are still partially embedded in a 1 m thick unit of yellow silty sandstone. In the debris we found remnants of small dinosaurs, turtles, crocodiles and plants. Layers below and above are rich in shallow marine invertebrates (e.g., oysters and other bivalves, gastropods) and characean cysts. We plan to map the clustered vertebrate material in the valley, collect the weathered out bones, invertebrates and plants, as well as debris samples for microfossil screen scanning, and survey the yellow sediment unit in order to prepare a scientific excavation in the near future. We will also take a detailed geological section and collect samples for lithological, micropalaeontological, microfacial and stable isotope analyses. A survey of the adjacent area is essential for the understanding of the geological and palaeontological context of the dinosaur site. (Kooperationsprojekt: apl Prof. Dr. Eberhard „Dino“ Frey, SMNK, Prof. Dr. Wolfgang Stinnesbeck, University of Heidelberg).