Ключевые слова: arrangement, boulders, clustered, collection, composition, earth, elements, environment, formation, geology, gravel, ground, group, heap, igneous, juxtapose, landscape, metamorphic, mineral, mineralogy, nature, neat, orderly, organized, outdoors, pebbles, pile, rocks, rough, rugged, sedimentary, set, situate, solid, stack, stones, structure, wilderness,