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Harahap, B.H., author
Andesitic and basaltic lavas are the main product of the upper Miocene volcanic activities in Lubuk Sikaping region. They posses vesicular and amygdales structure, dark grey to black in colour, highly porphyritic in texture composed of plagioclase, clinopyroxene, orthopyroxene, olivine (in basalt only) and minor hornblende, magnetite and ilmenite. They...
Bandung: Pusat Survai geologi Bandung, 2011
665 JSDG 21:1 (2011)
Artikel Jurnal Universitas Indonesia Library
