Ключевые слова: abstract, aged, algae, backdrop, background, biology, black, close up, color, colored, cover, design, detail, ecology, ecosystem, environment, fungi, geology, grain, granite, green, grey, grungy, lichen, map, mineral, mountain, natural, nature, old, organism, outdoors, patches, pattern, physcia, physcia sciastra, rhizocarpon, rhizocarpon geographicum, rock, sparse, stone, surface, sustainability, symbiotic, texture, textured, wall, weathered, weathering,