EARTH-BASED AND LUNAR ORBITAL RADAR STUDIES HAVE IDENTIFIED A NUMBER OF LOW-RADAR RETURN DEPOSITS ON THE LUNAR SURFACE THAT OCCUR IN ASSOCIATION WITH VOLCANIC DOMES AND OTHER VOLCANIC FEATURES SUCH AS RILLES. THESE HAVE BEEN INTERPRETED AS BEING PYROCLASTIC DEPOSITS HOWEVER THEY CANNOT BE EASILY GROUPED WITH THE TWO MAJOR CATEGORIES OF LONG-KNOWN LUNAR PYROCLASTIC DEPOSITS- THE LARGE REGIONAL AND SMALLER LOCALIZED LUNAR PYROCLASTIC DEPOSITS (LPDS).