Hrad Vallis [SEP] located on astronomical body
Hrad Vallis
Hrad Vallis is an ancient outflow channel in the Cebrenia quadrangle of Mars, located at 38.7° north latitude and 224.7° west longitude. It is 825 km in length and was named for the word for "Mars" in Armenian.
Volcano ice interactions.
Large amounts of water ice are believed to be present under the surface of Mars. Some channels lie near volcanic areas. When hot subsurface molten rock comes close to this ice, large amounts of liquid water and mud may be formed.
indicated by their surface textures and ridged, lobate deposits at their margins and termini. The valleys of Hephaestus Fossae and Hebrus Valles are of extremely unusual form, and although sometimes claimed as outflow channels, are of enigmatic origin.
- Granicus Vallis ("graben radial to Elysium Mons")
- Hrad Valles ("graben radial to Elysium Mons")
- Tinjar Vallis ("graben radial to Elysium Mons")
- Hebrus Valles ("irregular depression; ends in discontinuous linear hollows")
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