Ключевые слова: abstract, agate, ancient, arizona, background, closeup, colorful, colourful, concentric, crystal, desert, detail, extinct, forest, formation, fossil, fossilized, geology, grain, hard, log, macro, mesozoic, mineral, national, natural, nature, navajo, old, outdoors, paleozoic, park, pattern, period, petrified, preserve, red, rings, rock, southwest, states, stone, texture, tree, triassic, trunk, united, usa, utah, wood, yellow,