08 December 2000
Vol 290, Issue 5498

About The Cover

Cover image expansion

COVER Regularly layered rocks such as these seen in western Candor Chasma (6.5°S, 77.2°W) are among the best examples of sedimentary rocks on Mars. This image was acquired in March 1999, shortly after the Mars Global Surveyor spacecraft attained its final, mapping orbit. The area shown is ~1300 m by 1600 m; layers are ~10 m thick. The spacing of ripples at far right averages 8 m. Layering attests to a dynamic sedimentary environment of global scale. See page 1927. [Image: NASA/JPL/Malin Space Science Systems]