Image display for discovery #11

WHITE ROCK got its nickname when contrasty image processing gave the feature, which measures about 15 by 18 km (9 by 11 miles), a chalky-bright appearance and suggested it was made of water-deposited sediments, like the salty residue of a dried-up desert lake. However, the Thermal Emission Spectrometer (TES) found that White Rock was built of wind-blown dry sediments. The image seen here was taken at visible-light wavelengths by another instrument, the Thermal Emission Imaging System on NASA's Mars Odyssey orbiter. Click on the image to download a larger version (3.4 MB). NASA/JPL/Arizona State University

Ruff, S. W., P. R. Christensen, R. N. Clark, H. H. Kieffer, M. C. Malin, J. L. Bandfield, B. M. Jakosky, M. D. Lane, M. T. Mellon, and M. A. Presley, Mars' "White Rock" Feature Lacks Evidence of an Aqueous Origin: Results from Mars Global Surveyor, J. Geophys. Res., 106, 23,921-923,927, 2001.