Megascopic description:

Granoblastic rock with little amount of lepidoblastic minerals. Probably of meta quartz/ feldsphatic arenite sandstone

Microscopic description:

The thin section of meta sandstone shows the porphyroblastic texture that the quartz and feldspar grains present as blasto-porpyroblasts, anhedral in crytals shape, some of them have the elongate shape, 0.3 – 2.0 mm, locally up to 3.5 mm in size, they embedded in the recrystallized of clay matrixs groundmass into illite/sericite with the patches of opaque minerals. The recrystallized of clay matrixs showed the orientation in the some area of thin section to form the foliation structure, some of them are folded and/or faulted to form the microfold or micro faults.

MACRO PHOTOGRAPH

MICRO PHOTOGRAPH

Sample: Photo location 26

PPL

XPL

The thin section of meta sandstone shows the porphyroblastic texture that the quartz and feldspar grains present as blasto-porpyroblasts in the recrystallized of clay matrixs groundmass into illite/sericite and they showed the orientation in the some area of thin section. Some of them are folded and/or faulted to form the microfold or micro faults.

MICRO PHOTOGRAPH

Sample: Photo location 26

PPL

XPL

The thin section of meta sandstone shows the porphyroblastic texture that the quartz and feldspar grains present as blasto-porpyroblasts in the recrystallized of clay matrixs groundmass into illite/sericite and they showed the orientation in the some area of thin section. Some of them are folded and/or faulted to form the microfold or micro faults.