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Valley Networks

NASA's Mars Global Surveyor shows small valleys in the martian cratered highlands are often quite old and have been modified by erosion and wind action. The valleys shown here are located on a crater rim in Terra Tyrrhena.
PIA02077
Credits: NASA/JPL/MSSS
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Description

Small valleys in the martian cratered highlands are often quite old and have been modified by erosion and wind action. The valleys shown here are located on a crater rim in Terra Tyrrhena. MOC took this picture in April 1999.