What mineralogical evidence serves as a definitive fingerprint of impact shock versus volcanic heat?

Answer

The presence of coesite or stishovite

Minerals like coesite or stishovite are high-pressure polymorphs of quartz that only form under the extreme pressure and temperature conditions characteristic of impact shock, distinguishing them from features created by volcanic processes.

What mineralogical evidence serves as a definitive fingerprint of impact shock versus volcanic heat?

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