Gullies and Seasonal Frost in a Crater This scene shows the curving, Eastern interior walls of a 12 kilometer-diameter (approximately mile-diameter) impact crater in the Southern mid-latitudes of Mars.
Pedestal Crater Margin This image shows part of the margin of a pedestal crater. A pedestal crater is a crater with its ejecta standing above the surrounding terrain. These form when an impact crater ejects material which forms a resistant layer. This resistant blanket coats material around the crater, which is thus eroded more slowly than the rest of the region. The result is that both the crater and its ejecta blanket stand above the surroundings.
Mars Pictures: NASA's Most Extraordinary Images EVER (PHOTOS)
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Stratigraphy of the North Polar Deposits This image shows an example of layers in the Martian north polar deposits. These deposits, part of the Planum Boreum dome, are composed mainly of water ice and small amounts of dust.
Lava Flow Margin: Daedalia Planum This observation shows the details of the distal end of a lava flow that likely started at the flank of Arsia Mons, several hundred kilometers away. Lava flows are abundant in the region south and west of Arsia Mons and most of them appear like runny wax, especially in images that cover large areas at low resolutions. #Mars