The Lava comes from the Italian word derived from Latin and means labes fall or decline. Lava is magma during its ascent through the crust, reaches the surface. When it surfaces, lava usually has temperatures ranging between 700 ° C and 1200 ° C.
Unlike magma, slowly cooled to great depths, lava undergoes atmospheric pressures, which make containing waste gases during ascent. Ambient temperatures are responsible for their rapid cooling. The distinction between the rock formed from magma (plutonic rocks) is that these crystals have often distinguished by the naked eye (phaneritic texture), while a rock formed from lava has crystals that are indistinguishable to the naked eye (texture aphanitic or vitreous).