This VIS image is located in Ravi Vallis, a channel running from the highlands of Xanthe Terra to the complex lower elevation Hydraotes Chaos. The tear-drop shaped island near the center of the image indicates fluid flow was from the left to the right side of the image. Orbit Number: 64209 Latitude: 0.0308233 Longitude: 320.437 Instrument: VIS Captured: 2016-06-04 18:52 http://photojournal.jpl.nasa.gov/catalog/PIA20801

The channels in this image are part of Ravi Vallis as seen by NASA 2001 Mars Odyssey spacecraft.

This image captured by NASA 2001 Mars Odyssey spacecraft shows a portion of Ravi Vallis.

This image shows another portion of Ravi Vallis. In this image taken by NASA 2001 Mars Odyssey spacecraft, a small crater and the resistant material formed during the impact form a donut on the floor of the valley.

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. Orbit Number: 78828 Latitude: -1.00608 Longitude: 316.825 Instrument: VIS Captured: 2019-09-22 00:20 https://photojournal.jpl.nasa.gov/catalog/PIA23523