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The Caucasus Mountains are an extension of the Appenines to the south. They stretch for more than 500 km south to north, separating the seas Imbrium and Serenitatis.  To the west of the mountains lies the crater Cassini.  The original crater is 60 km wide and 3 km deep, and was eventually flooded by lava.  There are several newer craters inside the old one.  The biggest forms a bullseye pattern in Cassini.  Farther west Mount Piton rises 2.3 km above the lava of Mare Imbrium.  

Image:  July 13, 2005