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A sheet-shaped mass of [[mineral]] material that usually cuts through [[rock]].
A sheet-shaped mass of [[mineral]] material that usually cuts through [[rock]].
Pellant, p. 251
Pellant, p. 251
=Sources=
=Sources=
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
*Pellant, Chris. ''The Complete Book of Rocks and Minerals'', Dorling Kindersley Inc.: New York (1995)
[[category:geology]]
[[Category:Geology]]