Today's Image of Mars shows landside lobes in a crater on Mars, as taken by HiRISE aboard the Mars Reconnaissance Orbiter. The southwest side of the crater has at three landslide lobes.
Scientists have determined that the landslides occurred long after the formation of the crater because there are few overlying craters on the lobes than the rest of the surrounding surface. Scientists speculate that the landslides were created by tectonic activity either created by asteroid impacts or faulting in the crust.
Clicking on this will take you to the original captioned image from HiRISE.