Ontology highlight
ABSTRACT:
SUBMITTER: Shang X
PROVIDER: S-EPMC3932896 | biostudies-other | 2014 Feb
REPOSITORIES: biostudies-other
Shang Xuefeng X Shim Sang-Heon SH de Hoop Maarten M van der Hilst Robert R
Proceedings of the National Academy of Sciences of the United States of America 20140203 7
The modern view of Earth's lowermost mantle considers a D″ region of enhanced (seismologically inferred) heterogeneity bounded by the core-mantle boundary and an interface some 150-300 km above it, with the latter often attributed to the postperovskite phase transition (in MgSiO3). Seismic exploration of Earth's deep interior suggests, however, that this view needs modification. So-called ScS and SKKS waves, which probe the lowermost mantle from above and below, respectively, reveal multiple ref ...[more]