Hrad Vallis is located in the transition zone between Elysium Mons and Utopia Planitia. Near its origin, at the northern edge of Elysium lavas, Hrad Vallis is characterized by a low-sinuousity channel within a north-northwest-trending, broad, flat-floored valley. A nearby flat-floored valley is parallel to the Hrad trend and parallel to elongate depressions, fissures, and faults in the region. An apparent hierarchy of landforms provides insight into the origin of the features associated with Hrad Vallis. An extended period of time is indicated during which freely circulating water existed on and beneath the surface of Mars. Karst and thermokarst processes imply very different climatic regimes and different host materials.
Lunar and Planetary Science Conference Proceedings
- Pub Date:
- Geological Faults;
- Mars Surface;
- Terrain Analysis;
- Planetary Evolution;
- Lunar and Planetary Exploration