Reading: How Are Igneous Rocks Classified?

igneous rock  According to the definitions, igneous rocks are rocks created when molten rock, or rock that has been liquefied by extreme heat and pressure, cools to a solid Igneous rocks are formed from the solidification of molten rock material There are two basic types: 1) intrusive igneous rocks such as diorite, gabbro,

Igneous Rocks ▫ Igneous rocks are formed by the cooling of molten rock ▫ There are two major states of molten rock: Magma and Lava ▫ Magma is a form of Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of magma, which is a hot (600 to 1300 °C,

Uses of igneous rocks : · Granite is very strong and long-lasting, used for making kitchen countertops, building materials · Gabbro is another rocks have higher Sr concentrations than Rock 1976 ) Sr = 1840 ppm ) , whereas igneous rocks of Variscan age between 360 and 260