| 11. | These consist of alkali-feldspar porphyritic quartz-trachyte and trachyte.
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| 12. | These consist of alkali-feldspar porphyritic quartz-trachyte and trachyte.
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| 13. | Later activity produced trachyte and phonolite plugs and lava flows.
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| 14. | Volcanic equivalents would be dacite, trachyte and trachydacite.
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| 15. | Rock types include trachyandesite, trachyte, syenite and amphibole-biotite granite.
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| 16. | These include nephelinite, basanite and peralkaline phonolite, trachyte and comendite lavas.
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| 17. | Pumice and trachyte eruptions at Puu Waawaa may be a sign of this change.
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| 18. | It occurs in sills as well as in the volcanic rocks andesite and trachyte.
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| 19. | The mountain is basically a column of trachyte.
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| 20. | On the village s outskirts is an old quarry where trachyte was once mined.
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