The fragmentation threshold of pyroclastic rocks

  title={The fragmentation threshold of pyroclastic rocks},
  author={Oliver Spieler and Ben Kennedy and Ulrich Kueppers and Donald B Dingwell and Bettina Scheu and Jacopo Taddeucci},
In response to rapid decompression, porous magma may fragment explosively. This occurs when the melt can no longer withstand forces exerted upon it due to the overpressure in included bubbles. This occurs at a critical pressure difference between the bubbles and the surrounding magma. In this study we have investigated this pressure threshold necessary for the fragmentation of magma. Here we present the first comprehensive, high temperature experimental quantification of the fragmentation… CONTINUE READING
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