ERS120H5 Chapter Notes - Chapter 4: Igneous Rock, Magma Chamber, Volcanic Glass
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Volcano a (cid:448)e(cid:374)t at (cid:449)hi(cid:272)h (cid:373)elt fro(cid:373) i(cid:374)side earth spe(cid:449)s o(cid:374)to the pla(cid:374)et"s surfa(cid:272)e = eruptio(cid:374). Lava what comes out of the volcano. Lava flow the lava that streams off over the mountain onto land. Igneous rock forms by freezing or solidifying of a melt. Rock that forms by the freezing of lava above ground, after it spills out onto the surface of the earth and comes into contact with the atmosphere or ocean, is extrusive igneous rock. Includes both solid lava flows, formed when streams or mounds of lava solidify on the surface of the earth. Volcanic ash, consists of fine particles of glass that form when a spray of lava erupts into the air and freezes instantly. Underground melt is referred to as magma, magma may accumulate into an irregularly shaped mass called a mass chamber. When magma solidifies underground, it becomes intrusive igneous rock, because it is made under the surface.
