| 41. | Built during the Quaternary period, it is composed of basaltic andesite.
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| 42. | Dykes have outcrops of trachytic andesite, dacite and rhyodacite.
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| 43. | Common surface rocks include basalt, andesite, pumice, and obsidian.
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| 44. | Andesites contain quartz and dacites-rhyodacites contain sanidine megacrysts.
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| 45. | Guallatiri has erupted andesite, dacite and rhyolite, with dacite dominating.
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| 46. | Eruption products on Escalante and Sairecabur include andesite and dacite.
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| 47. | Andesite lava flows from Pilisca underlie the Ciomadul deposits in some places.
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| 48. | One andesite lava flow has generated several subsidiary sulfur flows.
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| 49. | Basaltic andesite and minette form about 50 % of all exposed rocks.
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| 50. | Rocks erupted in the field are basaltic andesite and hawaiite.
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