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Western Melas and Candor Chasms, Valles Marineris
MGS MOC Release No. MOC2-105, 25 March 1999 |
 During its March 1999 operations, the Mars Orbiter Camera (MOC) on board the Mars Global Surveyor (MGS) captured this stunning wide-angle camera view of the western portions of Melas and Candor Chasms in the Valles Marineris canyon system. This view covers an area that is about 80 kilometers (50 miles) wide and 220 kilometers (137 miles) long. Melas Chasma is located at the bottom of the image, Candor at the top. Hints of layers in the canyon walls are evident in this image. Color and albedo (brightness) variations on the floors of each chasm indicate the relative distribution of dark sand and brighter sediments and/or rocks. Dark sand on the floor of Melas Chasma was also seen by MOC in March 1999 (see MOC2-104) and bright layered material was observed in Candor Chasma in April 1998 (see MOC2-59). The colors shown here are not true colors as they would appear to the human eye. The MOC has cameras that obtain images in red and blue portions of the visible spectrum; the green portion is synthesized using the combined average values of the red and blue channels (a relationship understood from Viking Orbiter imaging in the 1970s). Illumination is from the upper left. |
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