Tracing the ancient, water-carved scars of the Martian landscape
A massive 1,300 km-long channel reveals a violent, watery past. Using high-resolution stereo data from the Mars Express mission, we can now fly over the rugged terrain of Xanthe Terra to witness the remnants of ancient floods and massive cosmic impacts.
The Mars Express mission provides a window into the geological history of Mars, specifically through the lens of the Xanthe Terra region. Central to this landscape is Shalbatana Vallis, an immense outflow channel stretching 1,300 km. This feature acts as a geological record, cascading from the elevated highlands of Xanthe Terra down into the smoother, lower-lying plains of Chryse Planitia. The morphology of this channel—characterized by curving paths and carved channels—suggests that billions of years ago, significant surges of water moved through this region, sculpting the terrain we observe today.
Beyond the water-carved features, the landscape bears the marks of celestial violence. The journey through this terrain reveals islands that have survived erosion and concludes with a massive impact crater, roughly 100 km wide, formed by a collision with a space rock. To visualize these features, scientists utilized the High Resolution Stereo Camera (HRSC) Mars Chart (HMC30). This mosaic was constructed from single orbit observations, integrating image data with a digital terrain model to produce a three-dimensional reconstruction of the Martian surface.
The creation of this cinematic flyover required precise technical rendering. To ensure smooth movement, 50 separate frames are rendered for every second of the animation, following a predefined camera path. To make the topography more striking, a three-fold vertical exaggeration was applied to the terrain. Furthermore, to mask the limitations of the terrain model, researchers added atmospheric effects such as haze and clouds, with the haze programmed to intensify at distances of 250 km and beyond. This complex processing was a collaborative effort involving the German Aerospace Center (DLR), the DLR Institute for Planetary Research in Berlin-Adlershof, and the Freie Universität Berlin.
Source: Fly over Xanthe Terra with Mars Express
