Tanis (fossil site)
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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 di
Various fossils from the Tanis site
K-Pg boundary sample from Wyoming. The intermediate claystone layer contains 1000 times more iridium than the upper and lower layers (San Diego Natural History Museum).
Chicxulub crater
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The Chicxulub crater is an impact crater buried underneath the Yucatán Peninsula in Mexico. The crater is named after the onshore inland community of Chicxulub Pueblo. It was formed slightly over 66 m
Tanis (fossil site)
…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…
Artist's impression of the asteroid slamming into tropical, shallow seas of the sulfur-rich Yucatán Peninsula in what is today Southeast Mexico. The aftermath of the asteroid collision, which occurred approximately 66 million years ago, is believed to have caused the mass extinction of non-avian dinosaurs and many other species on Earth. The impact spewed hundreds of billions of tons of sulfur into the atmosphere, producing a worldwide blackout and freezing temperatures which persisted for at least a decade.
The center of the crater is near Chicxulub Puerto.
Stela in the main square of Chicxulub Puerto commemorating the impact
Pingualuit aerial 2007