VOLCANIC STONE

Volcanic rocks – are derivatives of magmatic rocks, which are created thanks to the volcanism phenomenon, in the course of which magma solidifies in the form of lava under or on Earth’s surface. The composition of each is different because solidifying lava releases water to the atmosphere therefore, minerals with such compounds will not be created inside it. Volcanic rocks may be created directly from lava (extrusive igneous rocks) or formed by volcanic explosion or aerial expulsion (pyroclastic rock). Even the most minute particles of pyroclastic rock may circulate in the atmosphere for many years and then fall on Earth, most frequently in a solid state. Pyroclastic rocks include volcanic rocks, pumice, volcanic ashes and tuffs.
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