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One kind of volcanic glass that has holes caused by pockets of gas?
Wiki User
∙ 14y ago
Scoria is the best answer, but under some circumstances, probably pumice
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoThe holes were pockets of expanding gas that became trapped when the molten material quickly solidified.
Wiki User
∙ 16y agoProbably rhyolitic pumice.
Wiki User
∙ 15y agoPumice and scoria.
Wiki User
∙ 14y agoScoria
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