Wednesday, December 6

Second meteorite would have finished with the dinosaurs | Digital Trends Spanish

The Nadir Crater, located near Guinea in West Africa, may hold the answer to the question of whether a second Meteorite hit the Earth simultaneously to kill the dinosaurs.

The crater, hidden under some 900 meters of water and 400 meters of sediment, has not yet been studied directly; It has only been detected in reconstructions of the ocean floor made with seismic waves. To prove that it is an asteroid, scientists will have to drill into the structure and find minerals impacted by extreme heat and pressure. But the shape of the crater points to an extraterrestrial origin, said David Kring, a senior scientist at the Lunar and Planetary Institute who was not involved in the current study but was one of the discoverers of the impact site. Chicxulubthe crater left by the asteroid that killed the dinosaurs 66 million years ago.

“I have to commend the team for finding what looks like a likely impact crater,” Kring told LiveScience. “That’s very important, because we have very few preserved impact craters on Earth. Land. Each one we can find provides a new window, new insights into the geological processes that make them up and their effects on the biological evolution of the Earth.”

The new crater formed very close in time to the Chicxulub impact, raising the possibility that the two may be related.

Based on the rock layers in and around the crater, Uisdean Nicholson, a geologist at Heriot Watt University in the United Kingdom, and his team found that it is about 66 million years old, about the same age as the impact that created the Chicxulub crater in front of it. to the current Yucatan Peninsula, ending the age of the dinosaurs.

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