Rock Classification

Rock Classification October 11, 1999 Classifying Rocks Rocks argon sort out to make it easier on people to identify them in the future. This can be through by a numerous amount of ways. Each thrill type has their own specific ways, but there are two distinct characteristics that apply to all. These are texture and composition. These two, on with many others helps to classify flaming, sedimentary, and metamorphic rocks. Igneous rocks are classified first by texture. This is broken down mainly into atom size. First there are intrusive, or plutonic eruptive 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 midget grains. A combination of the two would be porphyritic, large grains in an aphanitic, or extrusive matrix. Secondly, composition is used to classify igneous rocks. There are four types, ultramafic, mafic, intermediate, and felsic. ...If you want to get a full essay, order it on our website: Ordercustompaper.com

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