Viscous shear in the asthenosphere accommodates relative motion between Earth's surface
plates and underlying mantle, generating lattice‐preferred orientation (LPO) in olivine …

Although an average westward rotation of the Earth's lithosphere is indicated by global
analyses of surface features tied to the deep mantle (eg, hot spot tracks), the rate of …

Observations of seismic anisotropy yield some of the most direct constraints available on
both past and present-day deformation in the Earth's mantle. Insight into the character of …

Seismic anisotropy is ubiquitous in the Earth's mantle but strongest in its thermo-mechanical
boundary layers. Azimuthal anisotropy in the oceanic lithosphere and asthenosphere can be …

We present global models of strain accumulation in mantle flow to compare the predicted
finite-strain ellipsoid (FSE) orientations with observed seismic anisotropy. The geographic …

Seismic shear waves that are polarized horizontally (SH) generally travel faster in the upper
mantle than those that are polarized vertically (SV), and deformation of rocks under …

The alignment of intrinsically anisotropic olivine crystals under convection is typically
invoked as the cause of the bulk of seismic anisotropy inferred from shear-wave splitting …

The portion of Earth's mantle lying below the hemispherical region occupied by the Pacific
Ocean basin is characterized by a unique style of convection. The unique dynamics below …

This chapter discusses seismic anisotropy in the mantle, highlighting mechanisms,
observations and interpretations. Although evidence of anisotropy in the Earth is now …

Patterns of mantle flow are most directly inferred from observations of seismic anisotropy,
which is mainly caused by the crystallographic preferred orientation (CPO) of olivine, the …