| 1. | Leucite is common in lavas but very rare in plutonic rocks.
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| 2. | The plutonic leucite-bearing rocks are leucite syenite and missourite.
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| 3. | The plutonic leucite-bearing rocks are leucite syenite and missourite.
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| 4. | Wherever they occur they accompany leucite-and nepheline syenites.
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| 5. | He also worked in the Leucite Hills of Wyoming and in Hawaii.
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| 6. | The volcano has produced leucite-bearing rocks with andesitic and trachytic composition.
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| 7. | It occurs within a xenolith in a leucite tephrite.
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| 8. | Melanite is found in some of the lavas, as in the leucite syenites.
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| 9. | Their commonest minerals are olivine, anorthite, hornblende, augite, biotite and leucite.
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| 10. | The leucite-hearing dike-rocks are members of the tinguaite and monchiquite groups.
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