Shock metamorphism & shatter cones

Above: A shatter cone in dolomite from the Kentland, Indiana impact structure (Specimen from Lawrence University.) Meteorite impacts are pretty amazing things. An impact crater forms instantaneously on a human time scale, with the shock wave from the impact propagation through the target rock in the following stages: contact and compression, crater excavation, and crater modification. Some… Continue reading Shock metamorphism & shatter cones