close-up view of a section of a jaggy mountain crest. rock, mountaineering.

apennine apennines bedrock boulder calcareous cave cavern cavernous clay clayey clayish cliff cliffside climb climbing coastline cost crack craggy crest crust crustal environment erode eroded erosion face flora foliation formation geologic geological geology grotto hole hollow indented jagged jaggy karstic layer limestone maquis massif mineral mountain mountaineering mountainside mountaintop peak plate ridge rock rocks rocky rough sediment sedimentary sheer spur steep stone stony summit top tufa vegetation weathered weathering