Model of Blobs in Earth’s Interior Explains Unusual Pacific Volcanism

Plume model

Deep inside the Earth are two huge blobs of dense rock splayed across the core-mantle boundary. One of the underground structures sits under the South Pacific and the other is underneath Africa. A computer model from UC Davis project scientists Juliane Dannberg and Rene Gassmoeller, members of the Department of Earth and Planetary Sciences in the College of Letters and Science, offers new insights into the relationship between the mantle blobs and the lava erupted at some Pacific islands. The model provides a possible cause for the geochemical trends present in some of these volcanic island chains. Read more at the UC Davis Egghead blog.