| 21. | The park consists of three syenite ( a weak form of granite ) mountains.
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| 22. | Units within the complex include carbonatite, nepheline syenite, phonolite, and ijolite.
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| 23. | The composition ranges from monzonite to quartz syenite.
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| 24. | The city has historically developed on seven syenite hills, some of which are high.
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| 25. | Extremely iron-rich olivine is rare, but is present in some nepheline syenite.
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| 26. | The intrusive members are syenite and carbonatite.
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| 27. | He also collected minerals and is noted for his findings of syenite �s a ditroite.
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| 28. | In addition to gabbro, the second intrusive suite included nepheline syenite, diorite and monzonite.
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| 29. | The mountain is composed of essexite and syenite, strongly contrasting with the surrounding sedimentary rocks.
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| 30. | If the rock has a greater percentage of alkali feldspar, it grades into a syenite.
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