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 [[ | + | '''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. |
Pellant, p. 250 | Pellant, p. 250 | ||
Revision as of 22:39, July 14, 2007
'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.
Pellant, p. 250
Sources
- Pellant, Chris. The Complete Book of Rocks and Minerals, Dorling Kindersley Inc.: New York (1995)