File:ESP 018043 1500 (44892712431).jpg

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DescriptionESP 018043 1500 (44892712431).jpg	Possible Clay-Rich Terrain at the Mouth of Nirgal Vallis — Nirgal Vallis is a long river channel, whose western half is a branched system, but the eastern half is a tightly sinuous, deeply entrenched valley. We know that water once flowed here and the presence of clays helps to confirm that. But how much and for how long? NASA/JPL/University of Arizona (256 km above the surface; less than 1 km top to bottom and north is to the right) Source: www.uahirise.org/ESP_018043_1500
Date	24 September 2018, 11:31
Source	ESP_018043_1500
Author	UAHiRISE (NASA)

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