ref formatting: It might be be favored by academia, but it's more efficient in this case
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Mass of [[igneous rock]] that has formed beneath the surface of the Earth by consolidation of [[magma]].
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Mass of [[igneous rock]] that has formed beneath the surface of the Earth by consolidation of [[magma]].<ref>Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995) p. 251</ref>
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Pellant, p. 251
==References==
==References==
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*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)