Ridge and Trough System on Mercury
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Ridge and Trough System on Mercury

November 21, 2012
Instrument: Mercury Dual Imaging System (MDIS) Center Latitude: 60.2° Center Longitude: 36.5° E Scale: See 30-kilometer (19-mile) scale bar on image Of Interest: This image shows wrinkle ridges, which formed when the volcanic plains were pushed together and buckled, encircling a network of troughs or graben, which formed when the volcanic plains were stretched and pulled apart. The wrinkle-ridge ring, about 100 km in diameter, is formed over the rim of a ghost crater, an impact crater that was flooded and buried by lava flows. Read the full Mission News story for more details about a recently published scientific study of these unusual tectonic landforms. The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the key science questions that the MESSENGER mission is addressing. During the one-year primary mission, MESSENGER acquired 88,746 images and extensive other data sets. MESSENGER is now in a yearlong extended mission, during which plans call for the acquisition of more than 80,000 additional images to support MESSENGER's science goals. Credit: NASA/The Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/Smithsonian Institution

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