Oklahoma meteor crater found to be nearly 100 million years younger
Researchers from the University of Texas at Austin have determined that a meteor impact crater in Ames, Oklahoma, is 100 million years younger than previously estimated. The study used zircon crystal dating to correct previous biochronological errors.
Why it matters
This discovery challenges existing theories about Earth's geological history and the potential existence of ancient planetary rings.
Researchers at the University of Texas at Austin have discovered that a meteor hit Ames, Oklahoma, at a different time than previously believed.Under the small town of Ames, a crater lies buried beneath layers of rock. The crater is also important today because the area is a major oil and gas-producing region. Researchers have now challenged the fossil evidence that defined its age. Scientists had previously believed the impact was about 467.5 million years old. It was therefore considered part of a group of meteor impacts across North America known as the Ordovician Meteor Event. Because there were so many impacts around the same time, scientists theorised that Earth may once have had a ring of space rocks around it, similar to Saturn’s rings during the Middle Ordovician.
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