Lunar and Planetary Science XXXIII (2002) 2019.pdf THE CENTRAL MESAS OF HEBES, GANGES, AND EAST CANDOR CHASMAE. J. A. Jernsletten, Rice University Dept. of Geology and Geophysics, 1917 Florida Dr., Seabrook, TX 77586-2985,
[email protected]. Introduction: This paper presents a comparative Discussion: Figure 1 shows the DTM of Hebes study of the topographies of the central mesas in Hebes Chasma, Figure 2 shows the Ganges Chasma DTM, Chasma, Ganges Chasma, and East Candor Chasma. It and Figure 3 is the DTM of East Candor Chasma. is proposed that among the main factors in the post- These canyons are similar in width (~ 125 km), and all formation evolution of these central mesas are; fault- have central mesas located within them. The figures ing, erosion, mass wasting [8], tectonic processes [2, 4- have scale bars for reference, and the vertical shaded 7], geological structure and stratigraphy [3, 4-7], and bars indicate where the profiles in the following figures weathering and surface temperature [4-7]. All three of are drawn. Note that each north-south profile is these canyons are generally east-west trending [1]. The smoothed by averaging several profiles located at a data in this study is Digital Terrain Models (DTMs) range of longitudes together (the width of the vertical derived from Viking Orbiter 1 images used as stereo shaded bars show the range of longitude over which pairs. The mesas have roughly similar cross-sectional each summed profile is averaged). topographies and surface textures, indicating similar formation or post-formation evolution processes. DTM Left Img.