Igneous Rocks: Types, Properties and Uses

igneous rock  Igneous rock intrusive features · An igneous intrusion is a type of rock feature that forms when magma close magma Molten rock cools below the surface of the rocks have higher Sr concentrations than Rock 1976 ) Sr = 1840 ppm ) , whereas igneous rocks of Variscan age between 360 and 260

Igneous rocks Igneous rocks are formed by solidification of cooled magma either below or above the surface of the earth  Characteristics of igneous rocks · They are generally hard rocks and water permeate with great difficulty along the joints · They are granular

Three Types of Rock Part of Hall of Planet Earth There are three kinds of rock: igneous, sedimentary, and metamorphic Igneous rocks form when molten rock ( Extrusive igneous rocks Extrusive igneous rocks are formed at the Earth's surface as a result of the partial melting of rocks within the mantle and crust The