Shock transformations in quartzite

We report results of studies of experimental shock metamorphism in a quartzite sample. Shock pressure increases in the experiment from a rim to a center of the bowl-shaped sample due to a design of a recovery assembly. The section along an equatorial plane shows a progressive development of shock metamorphism. On the basis of observations, it is proposed that diaplectic glass can be a product of quenching a melt.