On the left side of the image above, the large depression is thought to be a volcanic vent that formed inside the peak-ring basin Praxiteles. On the right, the peak ring is discontinuous, and hollows are found in line with where the peak ring is expected. There are even hollows that have formed on portions of the vent itself. Images such as this hint at a possible relationship between the formation of explosive volcanic deposits and hollows.
Date acquired: October 18, 2012
Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington