grey loose river bed rubble shale stones ancient fossil fossilised fossilized prehistoric rock gravel limestone pebble pebbles river riverbed rocks sandstone slate stone texture architecture building cladding classic door front green house ornaments rural schist shutter shutters window windows bare bleak canada craggy difficult hard jasper landscape mountain natural nature panorama peak range Rockies Rocky Mountains rough snow summit view aggregate background closeup colored colours creative decorative deposit driveways gardening image landscaping outdoors paths pathways photo tailings terrain block boundary brown design earth earthy India Mud muddy pattern perimeter shade stone wall village wall austere cold conifers environment extreme forbidding forest harsh icy mountainside severe stern trees hike people trail travel Trek walk walker