PIA13504: Remnants of the Imbrium Impact
 Target Name:  Moon
 Is a satellite of:  Earth
 Mission:  Lunar Reconnaissance Orbiter (LRO)
 Spacecraft:  Lunar Reconnaissance Orbiter (LRO)
 Instrument:  Lunar Reconnaissance Orbiter Camera (NAC)
 Product Size:  1000 x 1000 pixels (w x h)
 Produced By:  Arizona State University
More details and images at LROC
 Full-Res TIFF:  PIA13504.tif (1.001 MB)
 Full-Res JPEG:  PIA13504.jpg (156.7 kB)

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Original Caption Released with Image:

Mare basalts embayed ejecta structures formed by the massive Imbrium impact in LROC NAC image M131501983R. Arrows denote the contact between younger mare basalts and older Imbrium ejecta, image width is 902 meters, or 2959 feet.

Mare basalts fill most of the large impact basins on the Moon, and in many cases the pre-existing topography was buried by the huge outpourings of lava. However, sometimes pre-existing topography is not completely buried by the mare basalts. When lava flows around a topographic high and does not bury it completely, the resulting landform is called a kipuka, and may be used to tell scientists about the region before the lavas flowed across the landscape. This kipuka in southwestern Lacus Somniorum is probably ejecta from the impact that formed the Imbrium basin. When looking at a regional view, this knob and others form relatively linear chains which can be traced back to the Imbrium basin.

Image Credit:
NASA/GSFC/Arizona State University

Image Addition Date: