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Fish fossils 66 million years died asteroid that killed the dinosaurs | technology


A team of US researchers has discovered an exceptionally well-preserved fossils of fish that died 66 million years ago, when he crashed into an asteroid that sealed the fate of the dinosaurs.

These fossils of ancient fish and other animals have been found in North Dakota site, 3000 km from the Chicxulub crater in the CaribbeanWhere was the impact of the asteroid.

The study, which will be published on Monday in the journal Proceedings of the National Academy of Sciences (PNAS), It shows how the episode had a devastating and rapid impact on large areasHe says lead author Robert DePalma, cites a dedicated website EurekAlert.

"It's like a museum at the end of the Cretaceous layer in the meter and a half thick," 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,

University of California
University of California

"The interweaving of freshwater fish, terrestrial vertebrates, the trees (…) and other sea creatures have been packed into 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 samples of new species and the other the best examples of a kind of" welcome DePalma.

"We are faced with an instant recording of one of the most important events in Earth's history. There is no other place which has tracks like these. "

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