Friday, August 30, 2013

Impact Craters and a Contractional Ridge Inside Copland Crater


Located in Copland crater, this image consists of three small unnamed impact craters and a contractional ridge that was partly destroyed by the two superimposed impact craters at the center. At one point extensive volcanic eruptions took place within Copland, forming a smooth surface. As the lava cooled it contracted, causing fractures and ridges to form. Images such as this give scientists a better understanding of the processes that accompany flood volcanism on Mercury and other planetary bodies.

This image was acquired as a high-resolution targeted observation. Targeted observations are images of a small area on Mercury's surface at resolutions much higher than the 200-meter/pixel morphology base map. It is not possible to cover all of Mercury's surface at this high resolution, but typically several areas of high scientific interest are imaged in this mode each week.

Date acquired: September 13, 2011
Image Mission Elapsed Time (MET): 224423780
Image ID: 755249
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 38.00°
Center Longitude: 72.66° E
Resolution: 35 meters/pixel
Scale: The largest crater is about 9 km (5.5 mi.) in diameter.
Incidence Angle: 75.9°
Emission Angle: 0.2°
Phase Angle: 75.7°

Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

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