Tuesday, November 17, 2009


Layers upon layers
Deposits of light-colored material lie atop sand dunes in the Noctis Labyrinthus formation on Mars, as shown in this picture from the high-resolution camera on NASA's Mars Reconnaissance Orbiter. Readings from another instrument, known as CRISM, suggest that the material contains iron-bearing sulfates and clay minerals.
The photo was released on Oct. 7.2009

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