Some volcanic hot spots may have a surprisingly shallow heat source
Geologic processes nearer the surface, rather than deep-mantle plumes, may fuel activity there
![satellite image of Ascension island](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2022/01/010622_sp_volcanic-hot-spots_feat.jpg?fit=1030%2C580&ssl=1)
Volcanic activity that formed the tiny island of Ascension, in the South Atlantic, may have been fueled by shallow geologic processes rather than a deep-mantle plume, a new study suggests.
NASA/Wikimedia Commons