Outflow Stream from Relatively Recent Martian Lake
This image taken by NASA's Mars Reconnaissance Orbiter covers an area about 8 miles wide in the northern Arabia Terra region of Mars. Researchers estimate the stream and the lakes it linked held water at some time in the range of 2-3 billion years ago.
This image from NASA's Mars Reconnaissance Orbiter shows many small craters over a larger degraded one in the northern lowlands. These small craters are smoother and shallower than their counterparts closer to the equator.
The central portion of this image from NASA's Mars Reconnaissance Orbiter spacecraft features a mildly-winding depression carved by water. Helas basin was likely formed around four billion years ago by a giant asteroid or comet impact.
This region of Xanthe Terra has mostly been contracted due to thrust faulting, but this local region shows evidence of extensional faulting, also called normal faulting. This observation is from NASA's Mars Reconnaissance Orbiter spacecraft.
This image from NASA's Mars Reconnaissance Orbiter spacecraft covers mesas, or high-standing plateaus, to the north and pits, or low-standing, depressions to the south. What formed these mesas and pits is a question not so easy to answer.
Captured by NASA's Mars Reconnaissance Orbiter spacecraft, shown here are bizarre landforms in Gorgonum Basin. This basin may have contained an ancient lake, with channels draining into the lake from the sides.
One small section of this image from NASA's Mars Reconnaissance Orbiter spacecraft shows boulders that have rolled down the slope of a crater wall. The boulders vary in size, with the largest one approximately 6 meters across.
Numerous Seasonal 'Lineae' on Coprates Montes, Mars
The white arrows indicate locations in this scene where numerous seasonal dark streaks have been identified in the Coprates Montes area of Mars' Valles Marineris by NASA's repeated MRO observations from orbit.