Abstract
Geophysics New pictures of Earth's interior reveal an ancient tectonic plate sinking toward the bottom of the mantle. Simmons et al. find the structure in seismic tomography images under the data-limited region of the Indian Ocean. Complete subduction of the plate occurred more than 100 million years ago. This observation suggests that old plates can hang around in the mantle longer than previously thought. It also provides a new piece of information for reconstructing plate motions and landmass locations in the distant past. Geophys. Rev. Lett. 10.1002/2015GL066237 (2015).
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