Alternative spelling of volcanic sulphur

Naturally occurring elemental sulfur as deposited at the fumarole of a volcano.

(volcanology) A tephra, larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption.

plural of volcanic bomb

(geology) Fragments of pulverized rock, minerals and volcanic glass created during a volcanic eruption.

plural of volcanic neck

plural of volcanic wind

A column of igneous rock formed by congelation of lava in the conduit of a volcano and later exposed by the removal of surrounding rocks.

A wind associated with a volcanic eruption, caused by the eruption or its convection currents over hot lava.

A natural glass produced by the cooling of molten lava, or a liquid fraction of it, too rapidly to permit crystallization.