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://bit.ly/1dbqO43.
Don't miss the other great articles in the July issue of EARTH Magazine. Discover how the "X-Man" alga acquires its mutant abilities; learn more about the discovery of and legal battles over the Kennewick Man; and read one geologist's take on science and faith, all in this month's issue of EARTH, now available on the digital newsstand at http://www.earthmagazine.org/digital.
Keep up to date with the latest happenings in Earth, energy and the environment news with EARTH Magazine online at http://www.earthmagazine.org/. Published by the American Geosciences Institute, EARTH is your source for the science behind the headlines.
The American Geosciences Institute is a nonprofit federation of geoscientific and professional associations that represents more than 250,000 geologists, geophysicists and other earth scientists. Founded in 1948, AGI provides information services to geoscientists, serves as a voice of shared interests in the profession, plays a major role in strengthening geosciences education, and strives to increase public awareness of the vital role geosciences play in society's use of resources, resiliency to natural hazards, and interaction with the environment.
Megan Sever | EurekAlert!
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