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Chiar Kkollu (hill) : ウィキペディア英語版 | Chiar Kkollu (hill)
Chiar Kkollu is a volcanic centre in Bolivia. It is a sill formed from primitive phyric alkali basalt that closely resembles ocean island basalt in composition and now appears as a hill. The rocks contain augite and olivine and the eruption site coincides with a local lineament〔〔 and is of Miocene age,〔 with dates of 22.51±0.45 mya by Ar-Ar dating and 25.2±0.5 mya by K-Ar dating.〔 The Chiar Kkollu magmas are Central Andes intraplate magmas and originate from the upper mantle.〔 == References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Chiar Kkollu (hill)」の詳細全文を読む
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