Matt Jackson on the Heterogeneity of the Mantle
Matt Jackson is a Professor of Earth Science at the University of California, Santa Barbara. \xa0He probes the chemical composition of the mantle by analyzing trace elements and isotopes in hot-spot lavas from around the world. \xa0In the podcast, he describes the intriguing heterogeneity among the hot-spots of the so-called \u201chot-spot highway\u201d in the western Pacific. \xa0The heterogeneity there, as well as on larger spatial scales is challenging our ideas about the motions of the mantle over the billions of years of Earth history.