This image acquired on May 20, 2021 by NASAs Mars Reconnaissance Orbiter, shows the high plains about 25 kilometers (15 miles) south of Coprates Chasma, near the eastern end of the Valles Marineris canyon system.
July 28, 2021
This image acquired on June 23, 2020 by NASAs Mars Reconnaissance Orbiter, shows terrain near Mangala Valles.
October 12, 2020
A small channel cuts across the floor of a gigantic 1100-mile (1780-kilometer)-long set of flood-carved channels in a region on Mars called "Kasei Valles."
June 6, 2019
This image acquired on January 26, 2019 by NASAs Mars Reconnaissance Orbiter, shows the floor of Ius Chasma, part of Valles Marineris.
April 16, 2019
This image acquired on December 9, 2018 by NASAs Mars Reconnaissance Orbiter, shows Athabasca Valles with lava flows originating from Elysium Mons to the northwest.
February 20, 2019
This image from NASA's Mars Reconnaissance Orbiter shows Ganges Chasma in the northeast portion of Valles Marineris. Scattered hills on the canyon floor may be remnants of chaos terrain that formed from collapse of the canyon.
July 30, 2018
This image from NASA's Mars Reconnaissance Orbiter shows a hill with a central crater. Such features have been interpreted as both mud volcanoes (really a sedimentary structure) and as actual volcanoes (the erupting lava kind).
June 11, 2018
This observation from NASA's Mars Reconnaissance Orbiter shows a set of straight ridges in ancient bedrock near Nirgal Valles. The patterns indicate fractures from tectonic stresses.
March 6, 2018
An enhanced-color image from NASA's Mars Reconnaissance Orbiter (MRO) reveals bedrock that is several kilometers below the top of the giant Valles Marineris canyons.
February 5, 2018
Layers, probably sedimentary in origin, have undergone extensive erosion in this image from NASA's Mars Reconnaissance Orbiter (MRO) of Shalbatana Valles, a prominent channel that cuts through Xanthe Terra.
January 23, 2018
The white arrows indicate locations in this scene where numerous seasonal dark streaks, called "recurring slope lineae," have been identified in the Coprates Montes area of Mars' Valles Marineris by repeated observations from orbit.
July 7, 2016
Blue dots on this map indicate sites of recurring slope lineae (RSL) in part of the Valles Marineris canyon network on Mars. RSL are seasonal dark streaks that may be indicators of liquid water. The area mapped here has the highest density of known RSL on Mars.
July 7, 2016
Among the many discoveries by NASA's Mars Reconnaissance Orbiter since the mission was launched on Aug. 12, 2005, are seasonal flows on some steep slopes, possibly shallow seeps of salty water. This July 21, 2015, image from the orbiter's HiRISE camera shows examples within Mars' Valles Marineris.
August 10, 2015
This view of Martian surface features shaped by effects of winds was captured by the HiRISE camera on NASA's Mars Reconnaissance Orbiter on Jan. 4, 2015. The spacecraft has been orbiting Mars since March 2006. On Feb. 7, 2015, it completed its 40,000th orbit around Mars.
February 9, 2015
Details of hilly terrain within a large Martian canyon are shown on a geological map based on observations from NASA's Mars Reconnaissance Orbiter and produced by the U.S. Geological Survey.
December 12, 2014