Impactite
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Impactite[1] is an informal term describing a rock created or modified by the impact of a meteorite. The term encompasses shock-metamorphosed target rocks, melts (suevites)[2], and mixtures of the two, as well as sedimentary rocks with significant impact-derived components (shocked mineral grains, tektites, anomalous geochemical signatures, etc.).
[edit] Some localities
Nördlinger Ries crater [3]
Rochechouart crater (visitor guide)
Darwin Glass from Tasmania