Today's Image of Mars shows a portion of Cerberus Fossae, a series of roughly parallel fissures in the Cerberus Region measuring 1,630km long. Cerberus Fossae was formed from faults created by the formation of the Elysium Volcanic Field. It passed through preexisting features, like hills, which indicates that the faults are relatively recent.
Research suggests that the formation of Cerberus Fossae released massive amounts of pressurized underground water, which led to the creation of Athabasca Valles, a large outflow channel on Mars.
Clicking this image will take you to the original high resolution image from Mars Odyssey Orbiter's THEMIS. [See the original THEMIS caption]