User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-81.159.201.139-20130109183116/@comment-5043481-20130114170616

Volcanic ash is not strictly ash in the normal sense. It is basicly finely powdered rock an silica (glass). It kills things becuse of it's many sharp edges. Breath it in and it's like your lungs have been attacked with razor blades.