Rock Classification October 11, 1999 Classifying Rocks Rocks be categorise to make it easier on people to identify them in the future. This can be by means of with(p) by a numerous amount of ways. Each complot type has their own specific ways, but there argon two distinct characteristics that apply to all. These are texture and composition. These two, on with many others helps to classify passionate, sedimentary, and metamorphic rocks. Igneous rocks are classified ad first by texture. This is broken down mainly into shred size. First there are intrusive, or plutonic perfervid rocks.
These types of rocks cool within the crust and forms large, visible crystals . The opposite would be extrusive, or volcanic rocks. These cool at the surface rapidly, forming little grains. A combination of the two would be porphyritic, large grains in an aphanitic, or extrusive matrix. Secondly, composition is used to classify fiery rocks. There are four types, ultramafic, mafic, intermediate, and felsic. Ultramaf...If you want to get a full essay, order it on our website:
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