Athabasca 'Islands'
Floods may have carved teardrop-shaped landforms in Athabasca Vallis in the Cerberus region south of Mars's Elysium volcanoes.
Features like these occur in central and eastern Washington in the northwestern United States. The Washington examples formed when massive amounts of water rushed across the landscape, scouring a 'channeled scabland' during the last Ice Age roughly 12,000 to 13,000 years ago. The features on Mars are much older. This is a mosaic of six Mars Orbiter Camera images taken from 1999 through 2002. The mosaic covers an area 11.9 kilometers (7.4 miles) by 13.0 km (8.1 mi).
NASA / JPL / Malin Space Science Systems

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