A unique morphology suggestive of viscous flow of a meters-thick surface layer was identified in high-resolution (10 ¿m. The meters-thick layer in which the viscous flow features formed is morphologically similar to a degraded meters-thick ice-dust surface deposit (dissected mantle terrain). Locations of the viscous flow features, dissected mantle terrain, and recent gullies are concentrated in the midlatitude regions, and all three show identical distributions as a function of latitude, with the maximum frequency of occurrence at ~40¿N and S. The strong association between these small-scale flow features and the dissected mantle terrain, large-scale viscous flow features, and recent gullies imply that deposition, deformation, and removal of ice-rich materials has played an important role in the modification of the surface in the midlatitudes of Mars during the Amazonian and possibly longer.