Volcanic ash
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5106-8446-9
High Quality Content by WIKIPEDIA articles! Volcanic ash consists of small tephra, which are bits of pulverized rock and glass created by volcanic eruptions, less than 2 millimetres (0.1 in) in diameter. There are three mechanisms of volcanic ash formation