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Thorium map of the Moon

Thorium map of the Moon
Thorium map of the Moon A map of the thorium content of the lunar surface based on Lunar Prospector data shows that a large area on the nearside of the Moon, including the Imbrium basin and Oceanus Procellarum, is enriched in thorium relative to the rest of the Moon. There is also an area of enriched thorium on the farside, within the South Pole-Aitken Basin, but it is less enriched than the area on the nearside. Data: NASA / ARC / Jeff Gillis; map by Paul Spudis