Difference between revisions of "Basic Rock"
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'''Basic rocks''' are [[igneous rock]]s that contain between 45% and 55% total [[silica]]. These have less than 10% [[quartz]] and are rich in [[ferro-magnesian mineral]]s. | '''Basic rocks''' are [[igneous rock]]s that contain between 45% and 55% total [[silica]]. These have less than 10% [[quartz]] and are rich in [[ferro-magnesian mineral]]s. | ||
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==Sources== | ==Sources== | ||
Revision as of 02:45, September 3, 2008
Basic rocks are igneous rocks that contain between 45% and 55% total silica. These have less than 10% quartz and are rich in ferro-magnesian minerals.
Sources
- Pellant, Chris. The Complete Book of Rocks and Minerals, Dorling Kindersley Inc.: New York (1995) p. 250