David CrownNASA Mars Data Analysis ProgramDistribution, Morphology and Age of Martian Debris ApronsUsing recently acquired high-resolution datasets for the Martian surface, we will examine the surface degradation, deformation, flow behavior, geologic setting(s), and age(s) of lobate debris aprons on Mars. This research will include: 1) Production of a global map of lobate debris aprons in conjunction with the preparation of a new digital global geologic map of Mars by Collaborators Tanaka and Skinner; 2) Evaluation and refinement of published MOC-based textural classifications of apron surfaces using CTX and HiRISE images to examine flow behavior and apron surface degradation; 3) Characterization of the morphology of small craters on apron surfaces to search for evidence of deformation and examine surface degradation (mantling, exhumation, sublimation); and 4) Compilation and analysis of crater size-frequency distributions for apron surfaces and surrounding terrains in order to constrain the ages of apron emplacement and surface modification. The results of this investigation will contribute to an understanding of the Martian hydrologic cycle by evaluating the distribution, age, and role(s) of ice at the surface of Mars.