Africa's Impact Structures:

Aorounga

        Location: Chad

        Latitude: N19 6'

        Longitude: E19 15'

        Age (Ma): < 345

        Diameter (km): 12.6

        Exposed at surface: yes

(Left) NASA Space Shuttle Image : STS38-77-005
(Right) Spaceborne Imageing Radar-C/X-Band Sythetic Aperture Radar (SIR-C/X-SAR)
Image of Aorounga Impact Crater (NASA/JPL).
The dark streaks are deposits of windblown sand.
The dark band in the upper right is being investiagted as a possible second crater.
Color variations are primarily due to the diverse radar reflection (roughness) characteristics
of different rock types.