volcanic glass English

Meaning volcanic glass meaning

What does volcanic glass mean?

volcanic glass

— noun a kind of natural glass produced when molten lava cools very rapidly

Topics volcanic glass topics

What do people use volcanic glass to talk about?

Universe, creation World Land

Volcano

• What do volcanoes produce?
  lava molten lava volcanic ash cloud of ash ash flow pyroclastic flow volcanic cinder volcanic glass (obsidian) pumice thunder egg