A team of US researchers has discovered an exceptionally well-preserved fossils of fish that died 66 million years ago, when Earth crashed into an asteroid that sealed the fate of the dinosaurs.
These fossils of ancient fish were found and other animals on a site in North Dakota, 3000 kilometers from the Chicxulub craterIn the Caribbean, where he was the asteroid impact.
The study, which will be published on Monday in the journal Proceedings of the National Academy of Sciences (PNAS), reveals how this episode was devastating and quickly through a large impact areas, said lead author Robert DePalma, who was quoted by the specialized website EurekAlert.
"It is like a museum late Cretaceous meter in thickness and half"Said Mark Richards, another author and professor emeritus of the University of California at Berkeley, in a statement of the Institute.
The turmoil caused by an asteroid giant waves generated in an inland sea that existed in what is now North Dakota, arriving in the adjacent river, where several fish live, the reverse current, the statement said.
Streams of stones and debris fell on the fish, which were buried in another wave, and froze for a long time.
"The intertwining of freshwater fish, terrestrial vertebrates, the trees (…) and other marine creatures were packed in this layer"Said Robert DePalma.
According to investigators, inhaled fragments promoted under the influence of the asteroid were found in the gills of the fish to death. Some of the fish were killed simply because of the ingestion of these materials.
Biodiversity disclosed on the site is typical. "At least some instances, new species and other best examples of its kind"DePalma welcomed.
"We are faced with an instant recording of one of the most important events in Earth's history. There's no other place that has traces how these".