From LROC Wide Angle Camera monochrome (689nm) mosaic of tell-tale Archimedes region, hugging the southeastern edge of the Imbrium impact basin. Even evidence for "emplacement" set forth in studies of 85 km-wide Archimedes (29.7°N, 356°E) was not enough for some early Space Age investigators to accept. Nevertheless, evidence mounted and the sequence generally went something like this: Imbrium impact, Archimedes impact affecting areas in the immediate vicinity, and then the Mare Imbrium mare basalt melt seen today, and embayment of lower elevations [NASA/GSFC/Arizona State University].
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