Dolorite formation called organ pipes was formed about 120 million years ago when the dolorite shrank as it cooled, near Twijfelfontein, Southern Damaraland, Namibia

Photo ID: NA-TW-organ pipes-0002

Photo keywords: Africa, African, Damaraland, Namibia, Southern Africa, dolorite, geology, organ pipes, riverbed, rock, stone, twijfelfontein