PAUL D STEWART / SCIENCE PHOTO LIBRARY PAUL D STEWART / SCIENCE PHOTO LIBRARY
The result of a massive meteorite impact 14.5 million years ago in Ries Germany. This is a shatter cone in hornblende kersantite rock showing fine horsetail fracture markings. Picture about 30 centimeters across. Such structures are widespread at meteorite strike sites around the world. It was produced by the massive shock pressure of the impact explosion of the meteorite deeply fracturing the rock below the site.
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