An all-new image captured by the Mars Reconnaissance Orbiter shows a 1.2 mile wide circle shaped formation within the Red Planet's Athabasca Valles region of the red planet. This image was taken by the HiRISE camera, which is on board the Mars Reconnaissance Orbiter.
Athabasca is an outflow channel on Mars. This region is believed to have some of the youngest lava flows on Mars and is approximately of the Late Amazonian age. It arose on the surface of the planet by the process of catastrophic flooding.