 Hrad Vallis may have been formed when the largeElysium Mons volcanic complex melted ground ice, as seen by THEMIS. | |
| Coordinates | 38°42′N224°42′W / 38.7°N 224.7°W /38.7; -224.7 |
|---|---|
Hrad Vallis is an ancientoutflow channel in theCebrenia quadrangle ofMars, 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" inArmenian.[1]
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. Hrad Vallis in the Cebrenia quadrangle is close toElysium Mons, a largevolcano, and may have supplied water to create the channel.[2]
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