The continental sized provinces at the base of the mantle were recently proposed to the remnants of Theia, the protoplanet that struck the Earth to form the Moon 4.5 billion years ago. But are other explanations for these provinces possible? See the discussion in Science.
Research from our group was highlighted in AGU's EOS Centennial Collections.
Our new paper is out today in Nature: Capture of nebular gases during Earth's accretion is preserved in deep-mantle neon by Curtis Williams and Sujoy Mukhopadhyay. To read some examples of press reports check out the UC Davis press release, Cosmos Magazine or the Daily Mail.
Our new paper is out today in Science: Preservation of Earth-forming events in the tungsten isotopic composition of modern flood basalts by Hanika Rizo et al. W anomalies in the mantle demonstrate that the Earth has not erased signatures from the main stage of planet formation. Also see the Perspective by Tais Dahl.
Check out our paper in EPSL on Evidence for multiple magma ocean outgassing and atmospheric loss episodes from mantle noble gases by Jonathan Tucker and Sujoy Mukhopadhyay. A perspective on the article is in the LA Times.