Compton–Belkovich Thorium Anomaly
Italy
The Compton–Belkovich Thorium Anomaly is a volcanic complex on the far side of the Moon. It was found by a gamma-ray spectrometer in 1998 and is an area of concentrated thorium, a 'fertile' element. Lunar rock samples from the Apollo missions reveal that most lunar volcanism occurred around 3 to 4 b
illion years ago, but this feature could have formed as recently as 1 billion years ago due to the unknown history of the Moon's far side.
Listen to the audio guide for Compton–Belkovich Thorium Anomaly Free on WIP — starts by itself when you arrive, even with the screen off