| 11. | The slopes of the peak are highly unstable, consisting of weak, hydrothermally altered felsic rocks.
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| 12. | The ages of these felsic rocks are generally between 2.5 and 3.8 billion years.
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| 13. | The chemical name of a felsic rock is given according to the TAS classification of Le Maitre ( 1975 ).
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| 14. | Continents must also be made up of less dense felsic rocks that " float " on underlying denser mafic rock.
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| 15. | The swarm consists of hundreds of dikes, filled with mafic to felsic rocks and are individually about in width.
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| 16. | For phaneritic felsic rocks, the QAPF diagram should be used, and a name given according to the granite nomenclature.
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| 17. | In addition, there are less dense felsic rocks in the western shore of the lake, which can contribute to the gravity low.
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| 18. | Exposed near a minor felsic lava dome is a fine grained, quartz-phyric felsic rock that may represent a rhyolite lava flow.
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| 19. | Augite is the most common ferro-magnesian in mafic rocks, but biotite and hornblende are on the whole more frequent in felsic rocks.
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| 20. | The darker soils, which support higher plant diversity, have developed on mafic rock; the medium-toned soils are on felsic rock.
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