Ciri Geokimia Batuan Vulkaniklastika di daerah Tanjung Balit, Sumatra Barat: Suatu Indikasi Kegiatan Magma pada EosenpDOIspana href"http//dx.doi.org/./ijog.vi." target"blank"./ijog.vi./a/span/ppVolcaniclastic rocks exposed in the Tanjung Balit area, West Sumatra, are red in color, ...