background erosion layers nature rock rock face sediments stone texture Zion National Park backdrop flow orange red ripples river rust sand sediment stream sunlight water yellow crack cracked dry dry mud earth everglades fango flats Mud parched textures tierra banks brown current Great Britain green hills natural pastoral rural trees wales welsh beach broken clam cockle-shell debris decease fragments marine mud flat mussel mussle ornaments part pieces sea seashell shard shards shell smithereens stones abstract ancient cliff color colour copy copyspace dressed erode eroded face fossil geological geology grain grainy grit gritty grunge grungy limestone mason masonry material outcrop oxide patina pattern rockface rough rusty sandstone sandy sedimentary space textured wallpaper weathered