Palaeontology directories usually speak thousands and millions of years, but America's Robert DePalma believes he can describe the minutes that followed one of the most important events in Earth's history: the devastating impact t of asteroid 66 million years ago.
“We're nearly certainly able to develop our time as a geologist, it's very rare” tsays Robert DePalma, 37.
The researcher, along with eleven co-ordinators, published in the Proceedings of the American Academy of Sciences (PNAS), a study that heard the world of paleontology at conferences in recent years, and that experts were invented 'the t look forward to confirming their scientific evidence.
Fossils of animals, frozen plants and nests
In 2012, the 30-year-old began exploring a site named Tanis in a region called dinosaur hunters, the Hell Creek Formation in North Dakota. Over the years, in the stratum 1.3 m thick, he got out – with the help of helpers and twelve students of freshwater plants of trees. and molluscs, as they are frozen in sediment and nested within one another with an unprecedented density.
"Almost the mud could be made straight away, capturing all these plants and animals in a few times" tthe researcher says.
The end of the cretaceous
The asteroid hit a 3,050 km point from its site, now the Yucatan peninsula in Mexico, in Chicxulub.
Scientists have long been discovering this impact, which has undoubtedly been cooled and concealed by removing the billion and tons of objects into the interior. T atmosphere, sweeping photosynthesis and 75% of land type – killing dinosaurs and opening the planet. away to mammals. At the time, a major canal in North America cut off two.
The researchers believe the influence of Chicxulub on an earthquake has produced an extraordinary amount of earthquake. The seismic waves of Tanis would be reached in 13 minutes, due to the distance …
The shake, like a bath, releases the water flesh "and he caused a great movement of ten meters in the river at Tanis carrying all the life under a sediment diver.
They also estimate that there are spherules, in fifteen minutes, stained glass glasses which are estimated to have the effect – on the start of water on the site. Scientists are found in the gills of fish and amber trees, and their separation is determined by age. The total amount is lower than the geological divides dividing the Cretaceous from the Paleogene.
Fossils preserved in three dimensions
Fossils are preserved in a remarkable way, in three measurements instead of being divided, according to the researcher, who is also teaching at the University of Atlantic Florida. "Until then, only three or four of Arctic fish were found at Hell Creek".Robert DePalma, who said more than twice, as well as new species, said.
"I can prove that there are fragments of a cheratopsian"he is also happy, promising at least a dozen scientific articles on freestanding, and other significant features.
The truth is that the first article published for the dinosaur has not been found or other fossils found and was mentioned in exhibitions for two years and in news releases this weekend, worrying. some experts.
"Everybody is awakened by the huge number of unusual things that will be mentioned … even though most of it is not featured in the article"Kirk Johnson, the Smithsonian Natural History Museum in Washington, says.
This is a survey "Interesting"however, he says that the experts in the field, including Walter Alvarez, his father in 1980, believe that asteroid had disappeared, coming together. the review. credit.
Robert DePalma explains that the series of events is the most likely set out, at this stage of the searches, on a site to be taken over yet "Decades". "This is a scientific nature, we always change our interpretation according to the data"he says.