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The petrology and Geochemistry of Merapi Volcano, Central Java, Indonesia
Merapi (125 km) is a large, active strato volcano on the segmented Indonesian volcanic front. It is composed of numerous pyroclastic flows, lava flows, and lahars, and characterized by classic flank domes. Its lavas are calc-alkaline hi-Al basalts and andesites ranging in SiO2 from 49 to 56 (%wt.), having the usual characteristics of low MgO, P2O2, TiO2, and high Al2O3, FeO and CaO.
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