Igneous Rock: Meaning, Texture, Characteristics, Types-Extrusive

igneous rock  With minerals better understood, it's time to discuss rocks The first type of rock we will discuss Igneous rocks collected at the surface of the earth provide some of the best evidence for the workings of the earth beneath the surface, for the chemistry and

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 Igneous rocks Igneous rocks are formed by the crystallisation of a magma The difference between granites and basalts is in silica content and their

A rock of intermediate composition is diorite if it's course-grained, and andesite if it's fine-grained A mafic rock is gabbro if it's course-grained, and Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth Great globs of molten rock rise toward the surface Some of the magma