Hebrus Valles

The Hebrus Valles have tributaries, terraces, and teardrop shaped islands. These features are all characteristic of erosion by fluid flow, but may or may not support the identification of this feature as carved by a single catastrophic outburst flood of water (as the term outflow channel would imply). There is also an extensive cave network which is expected to contain water ice. Researchers have found eight possible cave openings, or "skylights.” In addition, future colonists may be able to live in them. When the roofs of these cavities collapsed, skylight entrances became visible from orbit. The Thermal Emission Spectrometer (TES) discovered that the rock surrounding the cave entrances is rich in carbonates and sulfates, which easily dissolved by water. There is also much evidence that water flowed in the Hebrus Valles region, which contains tributaries, terraces, and teardrop-shaped islands that are formed by running water. == Gallery ==

Image:Hebrus Valles from Themis.JPG|The Hebrus Valles, as seen from Themis. Since discontinuous pits and troughs are present, it is believed the troughs were created by collapse of surface material into voids. ==See also==