Rocks at Brachina Gorge, Flinders Ranges, Sth Australia Clock by Terrella. A painting of a section of Brachina Gorge, South Australia, rock formations from the Cambrian era. The landscape is approximately 540 million years old. Approx 480km (298 miles) north of Adelaide, SA. • Also buy this artwork on home decor, apparel, phone cases, and more.