On this site NASA has provided images gathered by the Mars Reconnaissance Orbiter on April 4, 2007 of a Martian valley, Athabasca Valles. The video provides an aerial tour of what might be the yongest outflow channel on Mars. The high resolution images provided by the Reconnaissance Orbiter indicate that the Athabasca Valles is covered in a thin layer of lava. The presence of this layer indicates that a volcanic fissure eruption distributed lava through the channels in the valley in geologically recent times. The Athabasca Valles is located about 10° north latitude and 156° east longitude. (I could not get the video to load on the blog properly, so visit the site to check it out!)
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