Igneous rock is any rock made by the cooling of magma or lava. Igneous rocks come with or without observable crystals that are not in layers or with or without air holes or glasslike. Examples of Igneous rocks are granite, pumice, basalt and apache tears obsidian.
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a type of rock that forms when magma cools and hardens very slowly deep in earths crust...
Igneous rocks are rocks that form from the cooling of magma or lava, and "igneous" is derived from the Latin word for "fire." Examples of igneous rocks include basalt, granite, and pumice.
There are 3 main kinds of rocks. These 3 types of rocks are Igneous, Metamorphic and Sedimentary and pictures can be found in books at your local library.
All types of rock can melt. Thus potentially ALL types of rocks can form a magma. Your question - asking for 3 types, is therefore meaningless.
Clastic, Chemical and Organic sedimentary rock.