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How are rocks classified as igneous rocks?

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A rock is considered igneous if it formed directly from the cooling of molten rock.
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How are igneous rocks classified?

Igneous rocks are generally classified first on the basis of theirformation (and therefore their texture) as intrusive or extrusive.Intrusive rocks are solidified from magma u

How do igneous rocks form and how are they classified?

Igneous rocks are formed by the cooling of lava (above Earth's surface) or magma (below). Rocks in general are classified by their mineral composition, texture, and origin. Ig

What are two major properties used to classify igneous rocks?

The two major properties used to classify igneous rock are: Crystal Size/Texture--Small crystals are indicative of rapid above ground cooling of lava into what is classified