A ROCK INTRUSION WAS PRESENT IN THE #6 RIGHT XCUT CORNER. THE INTERFACE OF THE ROCK & COAL CONTAINED A SLICKENSIDE AT ROUGHLY 45 DEGREES INTO THE ROCK. ONE PIECE OF ROCK MEASURING ~10 1/2' LON G, 77' WIDE, AND FROM 29-12"" THICK CAME FROM THE LEFT RIB AND STRUCK THE VICTIM INFLICTING FATAL INJURIES.