Wargentin is  one of five so called inundated craters which lunar geologists conclude were filled by ejecta from nearby craters.  Some of the inundated craters; for example Spörer (formerly Herschel A), clearly  have their floors somewhat elevated above the surrounding base level of other crater floors or Mara. The other four inundated craters are generally much smaller and their crater floors are only slightly elevated above base level.  In contrast Wargentin is a plateau; indeed, it even looks like a terrestrial plateau. It appears that when Wargentin was formed. the underlying magma remained fluid long enough for any central peak to liquefy and fill the newly formed rim.  Hence we now see a lunar plateau with a wrinkle ridge as in many lunar Mara. Examine these images and tell me how you think Wargentin formed.