MacDonnell Ranges, Australia
The MacDonnell Ranges are a band of rugged mountains spanning Australia’s Northern Territory. Formed 300 to 350 million years ago, the ranges have endured folding, faulting, and erosion resulting in gaps and ravines. Some of the valleys in the ranges contain fossil evidence of an inland sea that once covered central Australia. This Landsat 7 image from 2000 shows only a portion of the ranges with vegetation in green against the blues, purples, and grays of the arid surrounding area.