Science offers a rational explanation: many floating stones are pumice, a volcanic rock formed when lava cools rapidly, trapping gas bubbles. These air pockets make pumice less dense than water ...

The pyroclastic igneous rocks have turned into pebbles after floating on water and rubbing against one another for two months or so. Banks of pumice have covered the surface of the sea along the ...

Floating bands of brown pumice were also observed in the surrounding waters. “This is moving from steam eruptions caused by magma coming into contact with seawater to one in which magma is ...