Documenting drainage evolution in Bir Kiseiba, southern Egypt: Constraints from ground-penetrating radar and implications for Mars

Details Documenting drainage evolution in Bir Kiseiba, southern Egypt: Constraints from ground-penetrating radar and implications for Mars Documenting drainage evolution in Bir Kiseiba, southern Egypt: Constraints from ground-penetrating radar and implications for Mars

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jgre..10909002g&link_type=abstract

Journal of Geophysical Research, Volume 109, Issue E9, CiteID E09002

Physics

Planetology: Solid Surface Planets: Instruments And Techniques, Planetology: Solid Surface Planets: Erosion And Weathering, Planetology: Solid Surface Planets: Origin And Evolution, Planetology: Solid Surface Planets: Surface Materials And Properties

Scientific paper

Ground-penetrating radar (GPR) helps to constrain the origin of relict and largely buried fluvial channels in the Bir Kiseiba region of southern Egypt. Our results indicate that the trunk channel to a tributary system identified in Shuttle Imaging Radar data is incised 10-12 m into bedrock, was southwest draining in its final configuration and laterally migrating toward the northwest, and accentuated relief along the nearby Kiseiba escarpment. Alluvium partially filling the main channel likely reflects effects of increasing aridity and bed load combined with less frequent, flashier precipitation. In contrast to defining channel margins, radar data do not indicate subtle stratigraphic changes in bedding related to fluvial aggradation, but do highlight local reflections likely corresponding to relict alluvial bedforms. Our results support the contention that an impulse GPR system, currently under development, could be deployed on a future Mars rover and assist in defining the regional evolution of the landscape and specific targets for sampling.

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