Glazed, powdered...or filled with lava? It's likely that volcanic activity played a role in forming these donut-shaped craters. The craters are unusual in shape but are fairly widespread on the pockmarked lunar surface.
#NationalDonutDay
http://lroc.sese.asu.edu/posts/1151
#NASAMoon
A Lunar Donut: Bell E Crater
Bell E Crater (22.06° N , 264.06° E; ~16 km diameter) controlled feature mosaic made from images M1139534784L/R & M1139527672L/R [NASA/GSFC/Arizona State University].lroc.sese.asu.edu