The rock 'Ithaca' is shown here with a rougher lower texture and smoother texture on top, and appears to be a piece of the local sedimentary bedrock protruding from the surrounding soil in Gale Crater as seen by NASA's Curiosity Mars rover.
Target for 100,000th Laser Shot by Curiosity on Mars
Since landing on Mars in August 2012, NASA's Curiosity Mars rover has fired the laser on its Chemistry and Camera (ChemCam) instrument more than 100,000 times at rock and soil targets up to about 23 feet (7 meters) away.
The channels and linear depression in this image captured by NASA's 2001 Mars Odyssey spacecraft are located on the western margin of the Elysium Volcanic complex. The channels were created by lava flow.
The channel in the bottom part of this image captured by NASA's 2001 Mars Odyssey spacecraft was created by lava flow rather than water flow. This feature is located in the Tharsis plains east of Olympus Mons.
In this image from NASA's Mars Reconnaissance Orbiter, we see an intersection of several fractures on the floor of Echus Chasma. One 'sector' appears to have been filled by a more recent viscous lava flow.