* Astronomy

Unusual feature lies under Ames

It packed so much energy that surface temperatures even 100 miles away rose 500 degrees in an instant. Here at ground zero, what remained was a crater eight miles across and a half-mile deep.
But no one had a clue about the event until one day in 1991. That's when Rex Olson, an exploration manager for Continental Resources, was looking at a computer map that his team of geologists compiled from drilling and seismic data. He noticed in the Earth's structure two miles beneath the surface a pattern that looked like "a cow track in the mud" - like a giant hoofprint.
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Latitude:  36°15'2.26"N, Longitude:  98°11'59.97"W

Diameter 16 km.
Age 470 ± 30 million years.
Not visible as a surface feature.

-- Edited by Blobrana on Tuesday 4th of May 2010 11:01:18 PM