November 30, 2012
Since the Moon has no atmosphere, no wind, and no rain, features on the surface are preserved for millions of years. The exact age of Linné crater is not known, although it is thought to be less than ten million years old. The new LROC images show a richness of detail that confirm this young age. The small black arrows on the rim point out small delicate fractures (lower left of opening image) that formed as the crater walls slumped inward. Also note the frozen impact melt flows amongst the boulders strewn along the steep inner wall (large white arrow). The new views provided by LROC show us that each crater has its own story to tell - no two are the same. Linné crater formed in a thick deposit of mare basalt. Typically young craters in mare have large numbers of boulders strewn around their outside flanks. Linné crater (2.2 km diameter) is a beautifully preserved young mare crater. Small white arrows indicate layering preserved just below the rim; these rock outcrops probably represent discrete lava flow deposits [NASA/GSFC/Arizona State University].