Magmatic evolution of Hekla, Iceland
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W. Scott Baldridge; Thomas R. McGetchin; Fred A. Frey; E. Jarosewich
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Article
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1973
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Springer
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English
⚖ 837 KB
The extrusive rocks of ttekla are predominantly flows of basaltic andesite and andesite (ioelandite) but each eruptive cycle is initiated by production of tephra of andesitie, dacitie, and even rhyolitic composition. The evolution of basaltic andesites to dacites and rhyolites can be explained by cr