Abstract
Anomalous shocked quartz with high density (less than 1 % of density-deviation) is considered to be a relict of ultra high-pressure at meteoritic impact. The shocked quartz grains can be found only in terrestrial and artificial impact craters, meteorites and the Cretaceous-Tertiary (K/T) boundary samples. Volcanic activity is considered to be started or accelerated by enormous impact event.
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MIURA, Y., KATO, T. & Imai, M. Evidence of earth catastrophe by anomalous shocked quartz at the K/T boundary. Celestial Mech Dyn Astr 54, 249–253 (1992). https://doi.org/10.1007/BF00049559
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DOI: https://doi.org/10.1007/BF00049559