60m-year-old meteor crater mapped in North Sea Scientists have mapped a small but well-preserved crater in the North Sea formed by a meteorite they believe smacked into Earth 60 to 65 million years ago. The impact crater measures about six miles wide and sits beneath 120 feet of seawater and more than 900 feet of sediment. Researchers believe the so-called Silverpit crater was formed after the catastrophic impact near Mexico's Yucatan Peninsula that scientists suspect contributed to the extinction of the dinosaurs. "We know so little about how impact structures are created when meteorites and comets hit," said University of...