Fossils found when asteroid collides with the earth 66 million years ago and dinosaurs are extinct
Sixty six million years ago, a huge asteroid fell near the Yucatan Peninsula in Mexico, and many animals were killed from the earth by the effect. Scientists have found such 'a moment when many life on earth has come to an end'.
66 million-year-old deathbed linked to dinosaur-killing meteor | Berkeley News
Dinosaur fossils discovered from the day an asteroid hit the Earth
https://www.usatoday.com/story/news/nation/2019/03/29/dinosaur-fossils-discovered-day-asteroid-hit-earth/3313515002
A research team by Robert DePalma, a curator of The Palm Beach Museum of Natural History in Florida, USA and a student at the University of Kansas, said that a tsunami and debris flow that occurred when an asteroid fell in North Dakota We have found fossils that can be identified by multiple animals buried in The fossils contain fish, mammals, insects, and mososaurs, which are valuable discoveries that accurately record the moment when many life on the earth died.
When the asteroid falls to the northern Yucatan Peninsula in Mexico 66 million years ago, it is believed that the impact caused a huge tsunami and violent shaking. Then, it is suggested that the tectite which arose from the fall of the asteroid fell from the sky, which may have ignited plants in the continent. In addition, it is believed that tectite clogged fish's gills in water and suffocated many fish.
When the tsunami that occurred occurred at the estuary, it was about 30 feet (about 9.1 meters) high. It is thought that the Tektite rain lasted about 10 to 20 minutes, and the second big tsunami filled the coast with gravel and fine sediments, and many fish were dead and dead. The fossils discovered this time are said to be valuable, clearly recording the moment of death of such many lives.
Trunk of the tree is the fossil was burned along with the fish, conifer leaves, of mammalian dead, mosasaur animal bones, insects, dinoflagellate , we mingled and ammonites.
The photo below shows the discovered fossil. It is clear that the heat generated by the fall of the asteroid has caused the burned and dead fish to become fossils as they accumulate.
Fossils have been found in the
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DePalma, together with two geologists from the University of California at Berkeley, will present a paper summarizing this fossil discovery on the Proceedings of the journal. Asteroids and comets that dropped to the Yucatan Peninsula, Mexico 66 million years ago, created a huge crater called the Thikshurv Crater on the sea floor, and scattered heat from the falling rocks and dust from the asteroids scattered in the atmosphere. It is believed that the clouds formed thereby covered the earth and caused mass extinction that killed 75% of life on earth.
At this time, it is tektite that is considered to be formed by the vaporized rock in the atmosphere. Among the 'fossil layers that record life when the asteroid falls' named 'Tanis' by DePalma et al., A texite about 1 mm in diameter is found.
The fossils found in the Hell Creek Formation in Bowman, North Dakota, have been found to be rich in iridium, a rare metal on earth. Iridium is a metal commonly found in clay layers commonly found in asteroids and comets, and is also used to determine the K-Pg boundary .
'We found that the fossils we found were not dinosaurs, but we will also find fossils when dinosaurs eventually die from an asteroid fall,' said David Burnham, one of the researchers involved in the research. Say.
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