Troughs and ridges. These wide troughs in Chryse Planitia have a narrow ridge running down the middle. How did these form? (North is to the right.)
HiRISE Picture of the Day archive. [More at links]
Troughs and ridges. These wide troughs in Chryse Planitia have a narrow ridge running down the middle. How did these form? (North is to the right.)
HiRISE Picture of the Day archive. [More at links]