Planetary geologists at Brown University, United States, have found a gully fan system on Mars that formed about 1.25 million years ago, which shows tantalising signs of water activity on the Red Planet. The fan offers compelling evidence that it was formed by liquid water that originated in nearby snow and ice deposits and may stand as the most recent period when water flowed on the planet.
Gullies are known to be young surface features on Mars. But, scientists studying the planet have struggled with locating gullies they can conclusively date. In a research paper that appears on the cover of the March issue of Geology, the Brown geologists were able to date the gully system and hypothesise what water was doing there. ANI
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