Iowa Impact Crater Confirmed
From AGI Public Relations (Alexandria, VA) - Scientists have recently confirmed the existence of an impact crater buried below the town of Decorah, Iowa. Scientists first discovered what they thought resembled a crater in 2008, but now it has been corroborated by an airborne geophysical survey. Scientists estimate the diameter of the crater at 5.5 kilometers wide, nearly five times the size of the Barringer Meteor Crater in Arizona.
Based on the crater's size, scientists calculate that the region was likely hit by a meteorite roughly 250 meters in diameter about 500 million years ago, and could be related to other Midwestern impact craters. Statistically, similar-sized impactors could hit Earth's surface every 30,000 to 60,000 years.
Read further in the July issue of EARTH Magazine to learn more about the crater and what implications it might have for the availability of water and mineral resources: http://www.earthmagazine.org/article/iowa-impact-crater-confirmed .