Acheron Fossae is a trough in the Diacria quadrangle of Mars. Its location is centered at 37.67° north latitude and 135.87° west longitude. It is 718 km long and is named after a classical albedo feature at 35°N, 140°W . The trough has seen intensive tectonic activity in the past.
Acheron Fossae Dissected Crater, as seen by HiRISE. Part of eroded floor is shown in image.
Acheron Fossae, as seen by HiRISE. Scale bar is 1000 meters long. Click on image to see dark slope streaks.
One theory is dark sand flowed down the slopes of Acheron Fossae. However, they lighten in color over time.
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