Layered deposits in Marsí Candor Chasma

Layered deposits in Marsí Candor Chasma

Fig. 8.20 . The high-resolution camera aboard the Mars Global Surveyor orbiter revealed the presence of layered material in the floor of western Candor Chasma, at the far end of the main depressions within the extensive Valles Marineris. The numerous, uniform deposits resemble regularly layered, sedimentary rocks found on Earth. The Martian features could therefore be due to sediments that settled out of liquid water in ancient lakes or shallow seas a few billion years ago. Other layered deposits found in craters or basins may have existed before the canyons opened up in the surrounding terrain, and might be due to deposits of airborne dust settling out of the atmosphere, that were later buried and compacted, or to layers of volcanic material. (Courtesy NASA/JPL/MSSS.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University