This pair of maps based on albedo information from NASA's Mars Odyssey orbiter and topographical information from NASA's Mars Global Surveyor orbiter indicates locations of confirmed sites of recurrent slope linea on Mars.
Add image to your album
Email this page Post this page to your Facebook wall Tweet this page

Maps of Recurrent Slope Linea Markings on Mars

This pair of maps indicates locations of confirmed sites of recurrent slope linea on Mars, with respect to elevation (upper map) and surface brightness, or albedo (lower map). Recurrent slope linea are a class of markings that might be caused by flow of salty water. These dark lines advance downhill during warmer months, fade away in colder months, and reappear the following year. A paper by McEwen et al. in Nature Geoscience in December 2013 focuses on recent confirmation that these features exist surprisingly close to the equator. A cluster of recent findings is in the Valles Marineris area.

The albedo information comes from the Thermal Emission Spectrometer on NASA's Mars Odyssey orbiter. Surface topographical information for the map comes from the Mars Orbiter Laser Altimeter on NASA's Mars Global Surveyor orbiter.

Image details


Date added:


2001 Mars Odyssey, Mars Global Surveyor (MGS)

2001 Mars Odyssey, Mars Global Surveyor Orbiter

Mars Orbiter Laser Altimeter, Thermal Emission Imaging System



Full-Res TIFF:
PIA17607.tif (1.92 MB)

Full-Res JPG:
PIA17607.jpg (0.14 MB)

Image credit:
NASA/JPL-Caltech/Arizona State Univ.