Moon’s farside hints at violent volcanic explosions
![moon map of thorium](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/Compton-Belkovich_Thorium_860free.jpg?fit=860%2C460&ssl=1)
A map of the amount of thorium in different regions of the moon show that the element is concentrated mainly on the moon's nearside. But a tiny hot spot called the Compton-Belkovich region (labeled C-B) also exists on the farside of the moon and could have once harbored explosive silica volcanoes.
PROCESSING BY B. JOLLIFF, WUSTL/ASU/GSFC/NASA