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Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Scientists say the discovery of the field of killing fossils from the day of the death of the dinosaurs

Scientists say the discovery of the field of killing fossils from the day of the death of the dinosaurs



First, there was a strong shock. Then there was a roar of the 30-meter-long wave of water that casts fish on the sandy strip in the present North Dakota. Then there was a hail of molten rock that encircled dying fish and dying earthly creatures. Then the fires started.

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.0e) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = 66 million years, according to a study to be published in the National Academy of Sciences Procedure next week data-reactid = "32"> This is the way the dinosaurs began to die before nearly 66 million years, according to a study to be published in the National Academy of Sciences reports next week, supposing that the collapse occurred when a giant asteroid or a comet strikes the Earth just off the coast of the Yucatan Peninsula in Mexico.The new study sets out a scenario of how this cosmic impact kills species thousands of kilometers away, closing what is known as the chalk period

An ancient layer of rock, called "Tanis" in the North Dakota Creek Formation reveals fossilized fish remains, sea-like creatures called ammonites and marine reptiles known as mosasaur plus terrestrial animals including mammals and triceratops mixed with fossils are pieces of zgoreni tree trunks, sediment and tiny glass beads known as tektites

The research team behind the discovery is headed by Robert DePalma, curator of paleontology at the Natural History Museum in Florida and a PhD student at the University of Kansas. Deppalma has been studying the site of Tanis since 2013 and says it sheds light on the chain of events that created the famous geological and biological dividing line known as the Creta-Paleogene border, the Cretaceous Tertiary border or simply the K-Pg or KT boundary.

<p class = "canvas-atom canvas-text Mb (1.0em) Mb (0) – sm Mt (0.8em) – sm" type = "text" content = that someone has discovered linked to the border of the CT DePalma says in a press release number of species representing different ages of organisms and different stages of life, all of which died at the same time, on the same day. "" This is the first mass gathering of large organisms that has been linked to the boundary of the CT, "said Depalma in a press release." In no other limit of the Earth's KT they can not is to find such a collection consisting of a large number of species representing different ages of organisms and different stages of life, all of which died at the same time, the same day. "

Researchers Jan Smith, Mark Richards and Walter Alvarez are together on Tanis. [Robert DePalma Photo via UC-Berkeley]

A sludge cover that covers the rubble. was rich in iridium, confirming the link with Alvarez's giant asteroid hypothesis.

"When we proposed the hypothesis of influence to explain the great extinction, it was based only on finding an anomalous concentration of iridium – the asteroid or comet's print. Alvarez said. – Since then, evidence has been growing steadily. But it never occurred to me that we would find such a deathbed. "

Researchers say the carnage must have started quickly – too quickly to be explained by a tsunami arising from Chicxulub's asteroid strike. "Tsunami would have taken at least 17 hours or more to get to the crater site, but the seismic waves – and subsequent excitement – would have reached tens of minutes," said Depalma.

DePalma credits Richards with refining.

"When Marc boarded aboard, he discovered a remarkable artifact – that the incoming seismic waves from the impact site would have reached almost the same time as the atmospheric time of the trip of the discharge," DePalma said. "This is our big breakthrough."


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