karst cave with ice drifts and stream, glaze ice

attraction avalanche blister body built cave cavern chrystocrene clay coalmine coating colliery corridor crossing crust deep earth exploration falling flood flooding frazil geo geology glacier glare glaze gold grotto ground halffilled hole ice iceslick icefield icing labyrinth landfall landslide landslip layer limestone mine mound mystery natural nature of passage pit rock rocks seamless shaft silo spelaean up