A SHARPER VIEW OF IMPACT CRATERS FROM CLEMENTINE DATA

The ultraviolet-visible camera on the Clementine spacecraft obtained h igh-spatial resolution images of the moon in five spectral channels. I mpact craters mapped with these multispectral images show a scale of l ithologic diversity that varies with crater size and target stratigrap hy. Prominent lithologic variations (feldspathic versus basaltic) occu r within the south wall of Copernicus (93 kilometers in diameter) on t he scale of 1 to 2 kilometers. Lithologic diversity at Tycho (85 kilom eters in diameter) is less apparent at this scale, although the impact melt of these two large craters is remarkably similar in this spectra l range. The lunar surface within and around the smaller crater Giorda no Bruno (22 kilometers in diameter) is largely dominated by the mixin g of freshly excavated material with surrounding older soils derived f rom a generally similar feldspathic lithology.