Figure 36.1 Barringer Crater in northern Arizona.

This impact crater was created 50,000 years ago by an iron meteorite measuring 50 m across. The meteorite struck the ground at 40,000 km/hr, producing a blast equivalent to a 20-megaton hydrogen bomb. The crater itself is 1.2 km across and 200 m deep. (Meteor Crater Enterprises, Arizona)

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