Dinosaurs 'didn't disappear', says Ule professor

Lyon, 23 (Europa Press) Jorge García Giron, researcher at the University of Lyon (ULE), is a professor working regularly in the field of ecology...

Leonas, 23 m. („Europe Press“)

El investigador de la Universidad de León (ULE) Jorge García Girón, profesor permanente laboral en el área de Ecología, es uno de los principales autores del artículo titulado 'Late-surviving New Mexican dinosaurs illuminate high end-Cretaceous diversity and provinciality', publicado ayer en la revista 'Science' y en el que proporciona una nueva perspectiva sobre los últimos ecosistemas dominados por dinosaurios en la Cuenca de San Juan, al noroeste de Nuevo México (EEUU), según el cual estos animales “no estaban condenados a desaparecer”.

These last dinosaur fossil remains were collected from the Nashopito Member of the Ojo Alamo Formation.All dinosaurs except birds (and their modern descendants) died out about 66 million years ago, when an asteroid hit Mexico's Yucatan Peninsula, wiping out 75 percent of Earth's species.

Andrew Flynn, professor of geology at New Mexico State University and lead author of the study, says the Nashobito dinosaurs lived at the same time as giants of the collective imagination, such as Tyrannosaurus Rex or Triceratops.These animals were not in decline;On the contrary, their communities were numerous and composed of various species and breeds.

Unlike the famous dinosaurs of North America, Trichopterus and Edmontosaurus, the fauna of New Mexico, the fauna of New Mexico, in Europe report in Europe report.

Scientists estimate that Alamosaurus could exceed two large trucks in a row, weighing about 30-80 tons, with a very long neck and a height of about 9-15 meters. "It would be equivalent to a blue whale, but half as heavy," explained Jorge García Giron.

Los análisis llevados a cabo demuestran que los dinosaurios de Nuevo México, formados por especies totalmente distintas a las de Wyoming, Montana y Dakota del Norte, tienen la misma edad geológica, ha apuntado el profesor de la ULE, además de revelar que los dinosaurios “no estaban condenados a desaparecer antes de la gran extinción”, sino que se encontraban “en plena forma”, prosperando y el impacto del asteroide “los noqueó de golpe”.

"Our results contradict previous views showing that dinosaurs were exposed to environmental degradation that made them vulnerable to extinction," he added, explaining that another "key" finding of this study is that the mammals that survived the extinction maintained a very high biological diversity.

In this regard, Steve Brusset, professor of paleontology and evolution at the University of Edinburgh and co-author of the study, explained that mammals in the northern and southern regions of North America appeared very different from each other at the beginning of the Cenozoic era, in contrast to other mass extinctions, in which more ecosystems and communities took place.

Throughout Earth's history, the magnetic field has changed direction: sometimes normal (with magnetic north, as now), sometimes reversed (magnetic north to south).Scientists know when these changes occur and use them to calculate the time of deposition and formation of rocks.

The research team measured the direction of the magnetic pole in the rocks and found, along with the chemical ages of sandstone crystals from the same layers, that dinosaur fossils from northern New Mexico are the same age as Tyrannosaurus and Triceratops fossils in the famous Hell's Creek Formation, located in the North Dakota badlands.TODAY THERE ARE FEW FOSSILS

According to Jorge Garcia, the disappearance of the dinosaurs is the most famous mass extinction event in the history of the world.And in this contextThe "unpleasant truth" is that until now paleontologists have had only a few dinosaur fossils that could be definitively dated to the late Cretaceous period.which is much older than thatBefore asteroid extinction and statistical models

Now in mexico RESICO it is the end of periods of mexican gems, the ends of the osoro dynasty, many encounters, Brousive has seen.There were dinosaurs." he noted.

For this reason, Jorge García assured that it could be shown "without a doubt that these dinosaurs came from the last cretaceous.""They were the last living dinosaurs in New Mexico before the asteroid impact."