Ключевые слова: boulder, clefts, color shades, colored, colored lines, colors, crushed stone, formations, geological, geology, grain, gravel, holes, layers, lines, nature, pattern, porous, rock cleft, rock face, rock formations, rock forms, rocks, rough, sandstone, shades of color, shape, shapes, skirt, stone, stone cleavage, stone layers, stone pattern, stone splits, stones,