Signs of sediment-rich ocean lend direction to Mars life search
, Cardenas said his 3D models revealed the hills and ridges in Aeolis Dorsa"are actually stacked-up river deltas." Those deltas are groupable into 20 different systems that show an extended period of sea level change allowing for the deposit of the aforementioned 900 meters of sediment. That degree of sea level change and sediment deposit is"consistent with a northern ocean on a warm and wet early Mars.
According to Cardenas, that means circumstances in Aeolis Dorsa may be the right place to start the search for early Martian life. Mars's southern highlands would have been continually feeding nutrient-rich sediment into the northern Martian ocean, and with its delta-like ridges it's likely Aeolis Dorsa was where surface water entered the larger sea, rich in sediment.
"If there were tides on ancient Mars, they would have been here, gently bringing in and out water. This is exactly the type of place where ancient Martian life could have evolved," Cardenas said.
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