Formation de Hell Creek

Source: PaleoNeolitic

Copyright: Creative Commons CC BY-SA 4.0

Description

La formation de Hell Creek est une formation géologique, célèbre pour sa richesse en fossiles et son âge stratigraphique au sommet du Crétacé supérieur. Elle montre dans sa partie sommitale la présence d'un mince niveau enrichi en iridium, enregistrement de l'événement connu sous le nom d'extinction Crétacé-Tertiaire. Son nom vient de la Hell Creek où elle affleure largement, près de Jordan, au Montana .

La formation est située essentiellement au Montana, au Dakota du Nord, au Dakota du Sud et au Wyoming. Au Montana, la formation de Hell Creek recouvre la formation de Fox Hills et est la dernière formation du Crétacé. Le relief isolé du « pilier de Pompée » est constitué par des roches de la formation de Hell Creek.

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Source: Wikipedia.org

Copyright: Creative Commons 3.0

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Source: PaleoNeolitic

Copyright: Creative Commons CC BY-SA 4.0

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Source: PaleoNeolitic

Copyright: Creative Commons CC BY-SA 4.0

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