Ключевые слова: america, american, ancient, arizona, badlands, butte, canyon, colorful, dead, desert, earth, erosion, explorer, forest, formation, fossil, geology, hike, hiking, hill, jurassic, landscape, mesa, mountains, national, natural, nature, navajo, old, painted, park, period, petrified, prehistoric, preserve, ridge, sandstone, soil, striped, terrain, tree, trunk, united, usa, valley, west, wilderness, wood,