Apsus Vallis, as seen by THEMIS. Apsus is near the Elysium volcanic system; it may have been partially formed by the action of lava.
Apsus Vallis is a channel in the Cebrenia quadrangle of Mars, located at 35.1° north latitude and 225° west longitude. It is 120 km long and was named after a classical river in ancient Macedonia, the present-day Seman River.
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