The origin of lunar felspathic liquids

Abstract The critical features of the models which could produce felspathic liquids are discussed. There is no evidence which will support the production of felspathic compositions by dry igneous processes. Indeed, their very existence is the only evidence for their production by dry igneous processes. There is no evidence which will support plagioclase flotation. The cumulus textured troctolites and norites demonstrate that plagioclase sank. There is no evidence against the production of felspathic liquids by wet igneous processes which can account for all of the observed felspathic rocks and leave a residue capable of producing mare basalts.