Astronomers believe Holden Crater was once filled by at least two different lakes. Now all that remains are the relatively light-toned sediments deposited in those lakes, as seen in this observation from NASA’s Mars Reconnaissance Orbiter.
Each layer represents a different point in time and perhaps a changing environment for Martian life, if it existed. The elongated ridges with sharp crests are sand dunes.
DynHacks Team
No comments:
Post a Comment