Figure 1. Elevation data (inset) and mosaic of Mars Global Surveyor Mars Orbiter Camera images over THEMIS (thermal emission imaging system) data of southwest Holden crater, layered sedimentary deposits, and rim breach created by Uzboi Vallis. Inset covers 19°S–32°S, 27°W–40°W and elevations from +2500 m (red) to –2500 m (purple). Contours indicating –1960 m (white) and –2060 m (black) are indicated. High Resolution Imaging Science Experiment (HiRISE) images within figure boundaries are labeled in yellow. White numbers indicate locations of Figures 2–5. North is up.