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A type of rock formed from the cooling and solidification of molten lava or magma erupted from a volcano.
L'observation des roches volcaniques peut révéler l'histoire géologique d'une région.
Observing volcanic rocks can reveal the geological history of a region.
Volcanic rocks are classified into three main types: intrusive (plutonic), extrusive (volcanic), and hypabyssal (subvolcanic).
Volcanic rocks are often studied to understand past volcanic activity and the composition of the Earth's mantle.
Volcanic rocks are classified based on their formation process and mineral composition.
From French 'roche' (rock) and 'volcanique' (volcanic), derived from Latin 'volcanus' (volcano).
The term is used in geology to describe rocks formed from volcanic activity, distinct from sedimentary or metamorphic rocks.