September 29, 2009
Image Mission Elapsed Time (MET):
Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
400 meters/pixel (0.25 miles/pixel)
The bottom of this image is about 410 kilometers (250 miles) wide
15,900 kilometers (9,900 miles)
MESSENGER's high-resolution images have revealed large areas of Mercury's surface that appear to have been flooded by lava
, forming wide expanses of smooth plains
. The NAC image shown here gives a view looking over some of these smooth plains toward the horizon in the upper left corner. A large crater in the lower left has been filled with lava such that only portions of its circular rim are visible. Other examples of flooded craters can be spotted throughout the image, along with wrinkle ridges
snaking across the plains. "Volcanism on Mercury" is one of the topics being presented today by MESSENGER Science Team members
at the Geological Society of America Annual Meeting
in Portland, Oregon. Prior to MESSENGER, there was some debate regarding the extent to which volcanism had affected Mercury's surface, but now it is clear that volcanism was a major process in the planet's geological history.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
For information regarding the use of MESSENGER images, see the image use policy.