Here is a list of eleven most important igneous rocks: 1. Granites 2. Diorite 3. Andesite 4. Syenites 5. Gabbro 6. Dolerites 7. Basalts 8. Pegmatites 9. Aplites 10. Lamprophyres 11. Peridotites. 1. Granites: Granites may be defined as plutonic light coloured igneous rocks. These are among the most common igneous rocks. The word granite is derived from Latin word [...]
In this article we will discuss about the texture and classification of igneous rocks. Texture of Igneous Rocks: Factors Explaining Texture of Igneous Rocks: The following three factors will primarily define the type of texture in a given igneous rock: (a) Degree of Crystallization: In an igneous rock, all the constituent minerals may be present in distinctly crystallized forms and [...]
In this article we will discuss about the characteristics of granite and basalts which are the most significant examples of igneous rocks. Characteristics of Granites: Granites are the example of the plutonic intrusive igneous rocks which are formed deep within the earth. Since the rate of cooling and solidification of magmas inside the earth is very slow because of very [...]