Monturaqui

 

A crater was found in 1965 in the Monturaqui Mountains of Chile. There was found around the site small pieces of iron shale. They are remarkably similar in appearance to masses of iron shale from Meteor Crater in Arizona.

In addition to the iron shale which was found at the crater was recovered impactite which contains spherules of nickel iron. These cause the material to be variably magnetic. The impactite has clasts of serveral types of native rocks which have been incorporated into the mixed and melted masses.

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A very small amount of a third indicator of impact generated heat was found at Monturaqui Crater. This was a glass which like that found at some other craters is vesicular, banded and ribboned. Shocked minerals were also discovered at the crater. The feature is a simple crater, 460 meters in diameter. It is relatively old at about one million year. This age accounts for the lack of any true meteorite fragments remaining. The location of the crater is 23 degrees 56'S   68 degrees 17'W. The meteorite was a type IAB course octahedrite.

James P. Tobin 2003