A reorganization centered on the Pacific plate occurred~ 53–47 million years ago. A “top‐
down” plate tectonic mechanism, complete subduction of the Izanagi plate, as opposed to a …

Recent results (Wicks et al., 2010) suggest that a mixture of iron-enriched (Mg, Fe) O and
ambient mantle is consistent with wavespeed reductions and density increases inferred for …

Understanding tectonic and geodynamic processes leading to the present-day configuration
of the Earth involves studying data and models across a variety of disciplines, from …

Using a numerical model we explore the consequences of the intrinsic density change
(Δρ/ρ≈ 2–4%) caused by the Fe2+ spin transition in ferropericlase on the style and vigor of …

The D ″discontinuity is defined by a seismic velocity increase of 1–3% about 250km above
the core–mantle boundary (CMB), and is mainly detected beneath locations of inferred …

Seismic tomography and waveform modeling reveal several prominent structures in the
Earth's lower mantle:(1) the D''discontinuity, defined by a seismic velocity increase of 1–3 …