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Late Tertiary and Quaternary river systems of the eastern Sahara as mapped on shuttle radar and LANDSAT imagesSIR-A pictures of the Eastern Sahara show segments of what are interpreted as relics of once major Tertiary and Quaternary stream valleys. These previously unmapped features have a dark to very dark radar response and are generally concealed below a thin cover of flat to slightly undulating deposits, mostly of eolian origin. In most of the 150 pits and trenches we have studied to date, unconsolidated surface deposits range from a few centimeters to about a meter thick. The SIR-A system was able to "see through" this loose, dry material, to a depth of about a meter or two.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Mccauley, J. F.
(Geological Survey Flagstaff, AZ, United States)
Breed, C. S.
(Geological Survey Flagstaff, AZ, United States)
Schaber, G. G.
(Geological Survey Flagstaff, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984
Subject Category
Earth Resources And Remote Sensing
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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