Dear universe: One dinosaur-killing asteroid just wasn’t enough?
“The idea that [Chicxulub] had help — for want of a better phrase — would have really added insult to serious injury,” says study coauthor Veronica Bray, a planetary scientist at the University of Arizona in Tucson.have been discovered on Earth , the vast majority of which are on land. That’s because impact craters at sea gradually become buried under sediment, Bray says, which makes the Nadir structure a valuable scientific find, regardless of its birthdate.
Based on the structure’s dimensions, Bray, Nicholson and their colleagues calculate that, if an asteroid was responsible for the terrain, it would probably have been over 400 meters wide. What’s more, the researchers estimate that the impact would have rocked the ground like a magnitude 7 earthquake and stirred tsunamis hundreds of meters high.
Using geologic layers adjacent to Nadir, some with ages obtained by past studies, the team estimated the structure to have formed around the end of the Cretaceous period — 66 million years ago. The Nadir asteroid may even have formed a pair with the Chicxulub asteroid, the two having been ripped apart by gravitational forces during a previous Earth flyby, the researchers speculate.
South Africa Latest News, South Africa Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Vigil held for man found shot to death in stranger’s yard on Cleveland’s West SideThe 41-year-old, later identified as Major Whitley, was found in the front yard of a home in the 3700 block of Walton Avenue on Aug. 18.
Read more »
Chicago rapper Twista to host 'Stop the Violence Celebrity Basketball Game' on West SideChicago rapper Twista is set to host a friendly basketball game raising gun violence awareness. Players from 'The Chi' will suit up.
Read more »
Authorities ID 15-year-old killed in attempted robbery on West SideA teenage robbery suspect who was fatally shot on the West Side has been identified by the Bexar County Medical Examiner’s Office.
Read more »
West Nile detected in Rocky River, other counties; here are ways to avoid virus-spreading mosquitoesMosquitoes carrying West Nile virus have been found in Rocky River, as well as Lake, Lorain, Portage and Summit counties, according to state health officials.
Read more »
Wind energy and golden eagles collide in the U.S. West | AutoblogCODY, Wyo. — The rush to build wind farms to combat climate change is colliding with preservation of one of the U.S. West’s most spectacular predators — the
Read more »