We have done lithophile- and siderophile-element analyses of a large suite of target rocks, ballistically dispersed impact-melt particles and ballistically dispersed metallic spherules from Meteor Crater, Arizona. The Moenkopi Formation (topmost unit) has a unique lithophile-element signature that confirms it as a major component of the impact-melt particles. The Kaibab Formation is very heterogeneous, containing dolomite-rich and quartz-rich layers. The lithophile-element compositions of the impact-melt particles can be entirely explained as mixtures of Moenkopi and Kaibab depleted in CO₂. The Toroweap and Coconino Formations (lowest units) are not required components, but small contributions from them cannot be excluded....