Aromatum Chaos

This VIS image shows part of Aronatum Chaos. Aromatum Chaos is a depression about 90 km (56 mi) long by 30 km (20 mi) wide. At it's deepest Aronatum Chaos is 3,500 meters (11,500 ft) below the Xanthe Terra. On average, however, Aromatum is about 1,500 m (4,900 ft) deep. Mars scientists interpret chaos regions as places where groundwater has broken out and undermined the surface, loosening the rocky material and washing it away. Aronatum Chaos is at the head of Ravi Vallis, a 200 kilometers (125 miles) long channel located in Xanthe Terra.