Sixty years ago a massive asteroid collided with a shallow sea near Mexico. The impact on the 90-mile fault line and the mountains of the land entered the area. Earth debris fell into the planet in molten rock spits and glass.
Old fish glass blocks were trapped in their gills as they swam, crash, submerged underwater. Big slippery waves threw animals at dry land, and then more waves were buried in mud. Scientists working in North Dakota recently excavated these fish fossils: they died within the first minute or after the asteroid collision, according to a paper published in Academy Events. The National Museum of Sciences, a discovery that has boosted science amongst scientists.
"You go back to the day of the dinosaurs," said Timothy Bralower, the paleoceanographer positioner in Pennsylvania State that examines the effects and that was not involved in this work. This is the day that the dinosaur died.
About three in four species were lost in the name of the Paleogene badge, which has been named the K-Pg event or is extinct K-T. The most famous asteroid killer named the dinosaurs. But there was a variety of other living things with T. rex and Triceratops. The freshwater and marine creatures were victims, as were plants and micro-organisms, including 93% of plankton. (One branch of dinosaurs, the birds, lives.) T
Four decades of research support the theory that has disappeared from the asteroid, which is widely accepted as the most credible interpretation of extinct dinosaurs. In the late 1970s, Luis and Walter Alvarez, father-in-law scientist at the University of California, Berkeley, analyzed an unusual geological study between the Cretaceous and Paleogene times. The finish was full of the iridium element, which is rare in the Earth's crust, but is not in asteroids. Walter Alvarez is one of the authors of the new survey.
The Creek hell fossils represent "the first accumulation of a great mass of major organisms that any man" is situated at the end of K-Pg, the author described Robert DePalma in a narrative.
DePalma, a doctoral student at the University of Kansas, started taking out the site at the creation of North Dakota Hell Creek in 2013. Since then DePalma and other paleontologists have discovered lumps of sturgeon and sea fish with glass areas still in existence. their gills.
They found animals like smerans, called ammonites, shark teeth and the remains of pre-aquatic lizards called mosasaurs. They found dead mammals, insects, trees and Triceratops. They discovered fossil-long feathers, dinosaur trappers and holes from prehistoric mammals. They also discovered fossil tree guns called amber which had also seized the glass areas.
The site is “all signposted from Chicxulub effect,” said Bralower, including the glass beads and a lot of iridium. In the geological phase just above fossil deposition, there is bracken going on, eco-system signs falling back. "It's amazing," he said.
In the early 1990s, researchers discovered the rock leaving the asteroid – a fault in the Yucatán peninsula. The victory was named in the city of Chicxulub in Mexico. "Dead kills" proposed for Chicxulub effects are significantly decreasing: He may have poisoned the plague with heavy metals, unconfirmed the ocean, hiding the ground in hiding. In spite of darkness or about pursuing the rebellion. The pocket may have drawn volcanoes that were rubbing like broken soda canisters.
Hell Creek is over 2,000 miles from the Chicxulub crax. However, a few glass beads, called the tektites, the water there in 15 minutes' time were affected, by the author Jan Smit, a paleontologist at the University of Vrije in Amsterdam. early iridium end of K-Pg.
The fish, which is pushed into the mud as a flower in a diary, are well preserved. "It's the same thing to find people in life situations that were buried soon after Pompeii," Bralower said.
In the time of dinosaurs, the site of Hell Creek was a river glen. The river included inland waters that connected the Arctic Ocean to the Gulf of Mexico in history. After the attack on the asteroid, seismic waves of an earthquake of 10 to 11 ran over this ocean, according to the authors of the survey.
This did not cause a tsunami but what has been recognized as septic waves can sometimes be seen traces of back and forth in midges in a bathtub. These can be parameters of very far-reaching boundaries – such as the sensitive waves that forgiven Viking fjords in 2011 following the massive Tohoku earthquake near Japan.
Waves reached a seashore from the sea in 30 feet, drowning the river valley in water, gravel and sand. Water followed in rocks and glass. The tektites dug up "little fungi in the sediment that made the hide," said Smit, "so you know that they are coming down when the waves are still running up." This is retention, in other words, new hell.