Patterns caused by weathering in the rocks at Fortescue Falls, Karijini National Park (Western Australia).
An explanation of the Geology of Karijini National Park:
“Rocks exposed at the gorges originated as fine grained sediment which accumulated on an ancient sea floor 2,500 million years ago. At this time, the atmosphere contained much less oxygen and the only forms of life were simple bacteria and algae. Many of these sediments laid down in the oceans were rich in iron and silica.
Over hundreds of millions of years, the iron-rich deposits were transformed by the pressure of further sediments laid down over them, and they gradually turned into tough well-bedded rock. The gorges were eroded when a sharp drop in sea level caused the rivers to downcut rapidly—a process enhanced by the onset of a more arid climate, which depleted the protective vegetation cover on the valley sides. " Quoted from the “DEC website”: http://www.dec.wa.gov.au/component/option,com_h...
Nikon D60 (Nikkor 18-55mm lens)