geologic strata, joshua tree national park

america area arid arizona barren black boulder boulders bush cactus california cholla chrome clouds coachella creosote desert environment flora geologic geology grass green hill infrared joshua jumbo juniper landscape layer line lonely mohave mojave monochrome mountain national natural nature park picturesque plant plants protected rock rocks rocky sand scene scenery scenic skies sky southwest southwestern strata stratums stratus succulent tree unusual valley vegetation west western white wild wilderness yucca