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Browse All : Images of Cairo from 2004

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Gebel Edmonstone, Egypt
Gebel Edmonstone, Egypt
Gebel (or Mount) Edmons...<a href="http://eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=ISS009&roll=E&frame=12441"></a><a href="http://spaceflight.nasa.gov/home/index.html"></a><a href="http://eol.jsc.nasa.gov/"></a>
 
International Space Sta...
 
Description
ISS009-E-12441 (18 June 2004) --- Gebel (or Mount) Edmonstone is featured in this image photographed by an Expedition 9 crewmember on the International Space Station (ISS). Mount Edmonstone is a flat-topped mesa located near the Dahkla Oasis south of Cairo, Egypt. Gebel Edmonstone is a remnant of an eroding scarp that extends for over 200 kilometers (125 miles) east-southeast to west-northwest (visible in the upper left corner of this image). The flat caprock of both the scarp and Mount Edmonstone is chalky limestone underlain by fossil-bearing shale and fine-grained sedimentary rocks. This photograph has been ?stretched? to enhance color variations in the various rock and soil units. The color variations reflect differences in composition (or weathering) of the various rock units. The limestone unit capping Gebel Edmonstone and the adjacent scarp ranges from white to gray in color, while the underlying fine-grained sedimentary layers are blue-gray. Hill slope pathways for sediment movement down slope are clearly visible as brown to tan streamers originating from Gebel Edmonstone. Barchan dune fields are also visible in this color-enhanced image, and are distinct due to their mineralogical composition. Evaporite deposits are bright white, while vegetated portions of the Oasis? mostly agricultural fields?are dark blue-black. This additional information obtained from image enhancement can be used for geologic mapping and investigation of surficial processes operating in the region.
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