Minio Vallis is an old river valley in the Memnonia quadrangle of Mars, located at 4.3° south latitude and 151.8° west longitude. It is 88 km long and was named after a classical name for river in Italy.

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  Minio Vallis Hanging Valleys, as seen by HiRISE. Two hanging valleys are visible, as well as many dark slope streaks.
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  Minio Vallis, as seen by HiRISE under HiWish program Many dark slope streaks are present.