silicified shale rock stone on white background.

background black bomb carbonate chiefly clastic clay coarsegrained common composed composition consisting crystal diorite eruption extremely extrusive feldspar finegrained geology gold granite group hard igneous intermediate intrusive isolated kerogen lava limestone macro mass material mica microcline mineral mixture molten mostly mudstone name natural nature occurs ore orthoclase particles phaneritic piece plagioclase quartz removes rhyolite rich rock rough sandstone sedimentary shale silicified siltsized single stone tephra texture viscous volcanic volcano white