Moldavite is thought to have formed about 15 million years ago in the impact event that produced the Ries and Steinheim craters in southeastern Germany. An incoming asteroid is thought to have broken into two pieces that produced this pair of craters. The impacting bodies approached from the southwest. They hit with a high enough velocity to melt and splatter the target rock across a strewn field that includes portions of what is now the Czech Republic, Austria, and Germany.
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