English Lava balloon Cited by user KolbertBot on 28 Jan 2019 A lava balloon is a gas-filled bubble of lava that floats on the sea surface. It can be up to several metres in size.
English Lava balloon Cited by user KolbertBot on 28 Jan 2019 A lava balloon is a gas-filled bubble of lava that floats on the sea surface. It can be up to several metres in size.