Paleontologists are reporting discoveries on the site in New Dakota
After the asteroid hit the Earth 66 million years ago, the seismic waves appeared from the impact has trashed the pants, animals, water and buried in shifting sediments. That can be seen on the site in North Dakota. The researchers say that this site represents the moment that marked dinosaurs dead.
Moreover, other sites represent the same moment in history, but the Dakota site has an entire ecosystem affected by the disaster.
So what do we have from this site?
According to DePalma, a curator at the Palm Beach Museum of Natural History, the North Dakota site named Tanis after the “lost” ancient Egyptian city, has signs of the K-Pg impact in the sediments. At the impact, the asteroid tore a giant hole in Earth’s crust. The crust is 50 miles wide and 18 miles deep. Because of the impact, pieces of molten earth splash upward and outward into tiny glass blobs. After that, it started raining with particles named tektites, for about an hour in a torrent of glass.
At Tanis site, the tektites formed many layers of sediments that are interpreted as a sign of water sloshing back and forth. A mass of fish was buried and preserved very good after the impact.
Moreover, at the Tanis site marine fossils are present. The mixed fossils of ancient sharks, mosasaurs (an aquatic reptile), and an extinct type of mollusk called ammonite, are making the team to interpret a mix of land and ocean animals.
The researchers think that it was a rush of water, maybe a tsunami. Also, the water could have come from a powerful earthquake triggered by the impact.
Finally, DePalma’s work has gained claims and critics about the discoveries made on the Tanis site. The team is still working on the sites, they are trying to make a geological introduction, and all the excavated fossils will enter in a museum collection part. Even a horned-dinosaur bone is now at the Florida Atlantic University.