Scientists have found evidence of catastrophic meteorite collisions with Earth 66 million years ago. It is believed that this collision caused the extinction of the dinosaurs from the world.
Excavations in the US state of North Dakota have unearthed fossils of fish and trees with rock and glass particles raining down from the sky.
Evidence has also emerged that the remains were submerged in water, which may have been the result of gigantic waves rising after the meteorite fell.The study is published in the journal PNAS.
Robert Depama, of the University of Kansas, and his colleagues say the excavation site is located at Tans, and it gives a wonderful glimpse into the events that took place about ten minutes to a few hours after the asteroid hit the Earth. Would have happened during.
According to him, when the 12-kilometer-wide meteorite landed at the place where the Gulf of Mexico is today, billions of tons of molten rock would have flown in all directions and the debris would have traveled thousands of kilometers.
The fossils at the site of Tanas are a symbol of the time when the debris fell again after the eruption and engulfed everything in its path.
In fish fossils, the debris was found in their gills, which may have entered their bodies during the process of respiration.Particles of the debris have also been found in tree trunks.
Geological chemists have linked the particles to a site in the Gulf of Mexico called Chaksolub, and say the debris is 65.76 million years old. This is the time when the meteor struck the earth and evidence of this has been found in other parts of the world.
Scientists say the fossils discovered in Tanzania appear to have been swept away by a huge wave of water. Although it is acknowledged that a massive tsunami caused by the meteorite collision caused the wave to take several hours to reach North Dakota from the Gulf of Mexico.
However, researchers believe that the shock wave, similar to a magnitude 10 or 11 earthquake, may have shaken the region’s oceans long before the tsunami hit and that the same water may have come to Earth in the form of a large wave. This wave would have swept away the object in its path and thrown it to the place where it has now been discovered.
Dr. Dipalma says that “the tidal wave that swept across the land, including many freshwater fish, vertebrates, trees, branches, trunks, and many other things.”
“It would have taken at least 17 hours for the tsunami to reach this place, but the seismic waves and then the tidal wave would have reached here in a few minutes,” he said.
The study, which is being published online in the PNAS Journal, includes Walter Alvarez, a California geologist who worked with his father, Louise Alvarez, on the theory of how dinosaurs became extinct. Appreciated.
These geologists pointed out that in the ancient geographical periods of the Earth, the metal lime was abundant in the limestone layer, which is a partial element found in meteorites and meteorites. Iridium metal particles were also found in the remains of the tan.
Professor Alvarez says: “When we talked about the possibility of dinosaurs disappearing from the world due to the fall of a meteorite to Earth, we said it was due to the presence of iridium metal which was found in a meteorite or a comet.” Goes We have been gradually gathering evidence since then, but I never imagined that we would be able to access a place where the fossils of the animals of that time were in large numbers. “
Phil Manning of the University of Manchester, who is the only British author in the research paper, told the BBC: “It’s one of the most important places in the world. That’s the decent thing to do, and it should end there.