Ключевые слова: arid, arizona, badlands, bentonite, blue, boulder, boulders, clay, crystal, desert, desolate, desolation, forest, geological, geology, highland, hiking, hiking trail, hill, holbrook az, landmark, landscape, mineral, mineralogical, mineralogy, mountain, national park, natural, nature, park, petrified, petrified forest, petrified forest national park, petrified wood, purple, recreation, red, rock, rocks, rocky, sand, sandstone, silt, silty, stone, tourism, trail, travel, vast, volcanic,