Geologic Evidence for Extensive Ground Water System on Mars

Artist’s impression of Mars Express. The background image is based on an actual image of Mars taken by the spacecraft’s high resolution stereo camera. Image credit: Spacecraft: ESA/ATG medialab; Mars: ESA/DLR/FU Berlin)

UTRECHT, The Netherlands (Utrecht University PR) — Utrecht University geologist Francesco Salese studied 24 low-lying areas distributed around the northern hemisphere of Mars. Satellite images have provided evidence of large volumes of simultaneous ground water activity connecting the areas. Salese has also found remains of deltas and coastlines on the planet’s surface. “These are strong indications that water was once present in these dried-up basins. There is no evidence that they had been filled from the surface, so upwelling ground water is the only remaining explanation. The deltas are all located at approximately the same elevation, so we are probably dealing with a ground water reservoir that spans the entire planet.”