Report of the working party on the classification of the lunar igneous rocks

Abstract

A report is presented for a possible revised classification of lunar igneous rocks that still uses the division of Moon rocks into mare and highland types. It subdivides the mare rocks into basalts depending on TiO2 content and glasses depending on colour, and subdivides the highland rocks principally into KREEP basalts and into coarse-grained igneous rocks comparable to and using terrestrial igneous rock terminology.