mudstone rock on white background. a fine-grained clastic sedimentary rock.

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