Shoshonitic and calc-alkaline lavas from
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D. E. Mackenzie; B. W. Chappell
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Article
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1972
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Springer
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English
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Pleistocene to Recent stratovolcanoes in the Highlands of Papua New Guinea are made up of talc-alkaline to shoshonitic lava, tuff, agglomerate, ash, and lahar deposits. The volcanic rocks are characterized by high and variable Al, high K and total alkalis, and low Fe, Mg, and Ca. There is a continuo