Computer Science
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..195c&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 195.
Computer Science
3
Planetary Surfaces, Photomapping, Viking Spacecraft, Satellite Imagery, Planetary Evolution, Valleys, Flow Distribution, Mosaics, Image Resolution
Scientific paper
Terraces inside Ma'adim Vallis were presented in previous works as evidence of either changes in discharge rate, and/or multiple episodes of flows, or structural setting. However, no attempt to define the different levels of the valley were made. Using the 1:500,000-scale photomosaic maps and Viking images at 69 m/pxl mean resolution, we identified ancient courses of the confined valley by reconstructing three major floor levels. We estimated elevation by shadow-length measurement. When interrupted along the valley course, the terrace-levels were connected by elevation and morphology comparison. Locally, we used a stereo-pair image (432S19/434S14) to identify a difference in elevation between two floor-levels. We also identified the tributary networks associated with the different valley floors. The resulting map is shown in the figures A and B.
Cabrol Nathalie A.
Grin Edmon A.
Landheim Ragnhild
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