Pumice raft
Videos
A pumice raft is a floating raft of pumice created by some eruptions of submarine volcanoes or coastal subaerial volcanoes.
Pumice rafts from the eruption of Fukutoku-Okanoba submarine volcano in 1986, seen from a ship
A piece of pumice
Lava balloon
Videos
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. When it emerges from the sea, it is usually hot and often steaming. After floating
Pumice raft
…Floating island Lava balloons Pumice raft in South China Sea near Vietnam in August 1986…
Lava balloons during the 2011–12 El Hierro eruption, floating on discoloured water