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Tanis (fossil site)
Fossil site associated with the Cretaceous–Paleogene extinction event
Tanis (fossil site)
Tanis is a private paleontological site in southwestern North Dakota, United States. It is part of the heavily studied Hell Creek Formation, a geological region renowned for many significant fossil discoveries from the Upper Cretaceous and lower Paleocene. Based solely on the Tanis team's publications, the Tanis is unique in that it appears to record, in detail, concrete evidence of the direct effects of the giant Chicxulub asteroid impact which struck the Gulf of Mexico 65.5 million years ago, and wiped out almost all dinosaurs and many other species at the end of the Mesozoic. The extinction event caused by this impact began the Cenozoic, in which mammals—including humans—eventually came to dominate life on Earth.
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