Figure 2.  Location maps and topographic profiles of low slope regions on Mars and Earth. (A) Regional topographic slope for the southeastern Tibetan plateau margin [Clark and Royden, 2000]. (B) Topography compared to channel flow model. Channel thickness is 15 km and flow initiates at 20 Ma. Variable channel viscosities are indicated on the profile. (C) Location map for southeastern Tibet profile. Thick black line indicates profile location. (D-E) Topography and channel flow models for southeastern Tharsis (Thaumasia plateau). Model parameters are identical to those used for southeastern Tibet in B [Clark and Royden, 2000]. Topographic profile from Montgomery et al. [2009]. (F) Location map for SE Tharsis profile. Thick black line indicates location of profile.