speciment phyllite and schist of metamorphic rock on melange complex

are area background biotite central chlorite chorite closeup complex description earth element engineering exploration foliated geological geologist greenschists grey identification indonesia island java karangsambung lameral landscape macro melange metamorphic mica mineralogy minerals natural ophiolite pebble pelitc perfect petrology phyllite pink quartz rock rocks roks sampling schist sericite shiny specimen speciment stone structure study survey tectonic texture trench zone