Eberswalde Crater, north of Holden, has a vast river delta with clay soils that seem to have accumulated over centuries.
NEWYORKER: The Martian Chroniclers
Deltas like the one at Eberswalde, with their silty, gently deposited sediments, are often the best places to preserve organic remains.
There was an alluvial fan at the base of the mountain, for instance, that had some of the same sediments as Eberswalde.
Eberswalde might be the best place on Mars to find organics, but if none were found it had relatively little to teach us.
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