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erin-burnett » erin-burnett » Ma 1ère rubrique » Trove trouvé des fossiles de dinosaures dans l'Utah

Trove trouvé des fossiles de dinosaures dans l'Utah

Une nouvelle fournée de bien conservé des os de dinosaures, et même des arbres pétrifiés palourdes d'eau douce dans le Sud Utah pourrait fournir de nouveaux indices sur la vie dans la région, quelque 150 millions d'années.

Le Bureau de l'aménagement du territoire a annoncé lundi la découverte, en appelant la carrière de près de Hanksville "une grande découverte de fossiles de dinosaures."

Une fouille a révélé au moins quatre sauropods, qui sont à long cou, à longue queue qui se nourrissent de plantes dinosaures carnivores et deux autres, selon le bureau. Il mai ont également découvert un herbivore Stegosaurus.

Terriers des animaux et des troncs d'arbres pétrifiés 6 pieds de diamètre ont été trouvées à proximité. Le site ne contient pas de nouvelles espèces, mais les scientifiques offre la chance d'en apprendre davantage sur l'écologie de ce moment-là, dit Scott Foss, un BLM paléontologue.

Les fossiles de dinosaures sont de la même période de la fin du Jurassique que celles en Dinosaur National Monument, qui chevauche l'Utah-Colorado état ligne, et de Cleveland-Lloyd Price, près de la carrière.

Il pourrait s'agir d'une dizaine d'années avant toute l'importance de la Hanksville carrière est connue, a déclaré Foss. "Il a le potentiel pour répondre aux autres grandes carrières dans l'Utah", at-il dit.

Le site, d'environ 50 mètres de largeur par 200 mètres de long, a été fouillé par une équipe de l'Burpee Museum d'histoire naturelle de Rockford, Illinois Musée a visité le site pendant une semaine l'été dernier et est retourné cette année pour une période de trois semaines de fouilles .

La zone est connue depuis longtemps pour les autochtones et les fonctionnaires BLM havre comme un dinosaure. Mais on ne savait pas du site de l'ampleur jusqu'à ce que les fouilles ont commencé.

Les os ont été retrouvés dans une chaîne de grès d'une ancienne rivière.  

« La préservation de ces dinosaures est excellente », a déclaré Foss.  

Le mélange des dinosaures, des arbres et d'autres espèces dans la zone mai aider les scientifiques à rassembler ce que la vie était comme 145 millions d'années à 150 millions d'années, y compris des détails sur l'Antiquité climat, a déclaré Foss.

BLM de fermer le site pour procéder à une évaluation environnementale pour la poursuite des travaux dans la région. L'agence n'est pas de divulguer l'emplacement exact de la découverte des raisons de sécurité.

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