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This is an archive of AGU's GeoSpace blog through 1 July 2020. New content about AGU research can be found on Eos and the AGU newsroom.

Distribution_of_once-watery_basins_on_Mars

Distribution_of_once-watery_basins_on_Mars

This image shows the distribution of a number of deep craters (marked as dots) recently explored as part of a study into groundwater on Mars. The background image is shown in colors representing topography: reds and oranges are lower elevations, and blues and greens are higher ones. The study found that the floors of the basins, which sit over 4000 m deep, show signs of past water – the first geological evidence that the Red Planet once had a system of interconnected groundwater-fed lakes that spanned the entire planet.
Credit: Topography: NASA/MGS/MOLA; Crater distribution: F. Salese et al (2019)