Nili Fossae in Color

An unusual mix of orange and gray hues are on display in this approximately true color THEMIS VIS image. Using the pixel-averaging mode of the camera to allow for increased coverage (at lower spatial resolution), the scene spans over 190 km of the region known as Nili Fossae in NE Syrtis Major. Note how the orange hues tend to occur on upland terrain while the gray hues are mostly on the lowlands. This may be due to the action of gray, basaltic sand moving along the lowland terrain and scouring away the oxidized or weathered orange-brown surfaces.
Initial image processing and calibration by THEMIS team members J. Bell, T. McConnochie, and D. Savransky at Cornell University; additional processing and final color balance by space artist Don Davis.