Dear Colleagues, **Sorry for multiple cross-postings** With this email, we would like to bring your attention to our session about core–mantle interactions and processes at Goldschmidt 2021 to be held in Lyon, France. Goldschmidt 2021 will be in a hybrid format, combining an onsite meeting for delegates who can travel, with an online meeting for those who cannot. The deadline for abstract submission to Goldschmidt 2021 is approaching fast (26th February 2021, 23:59 CET). We look forward to seeing you in Lyon and also online! Abstracts can be submitted at this link <https://2021.goldschmidt.info/goldschmidt/2021/02/papers/index.cgi?sessionid=1853> . *Session 2g: **An interdisciplinary view of core-mantle interactions and processes **(https://2021.goldschmidt.info/goldschmidt/2021/meetingapp.cgi/Session/1853 <https://2021.goldschmidt.info/goldschmidt/2021/meetingapp.cgi/Session/1853>)* *Description*: The interior of the Earth is complex, heterogeneous, and ever-changing. At the surface, material is subducted into the mantle, and at the core-mantle boundary, interactions take place between the silicate mantle and the metallic core. While the core is the most inaccessible part of the Earth and other planetary bodies, signatures of its interaction with the mantle above can reveal key information about planetary evolution, from the earliest formation to the present. To decode such information is extremely valuable but also difficult, and often requires integrated interdisciplinary research. Advances in both experimental and theoretical techniques in recent years have greatly pushed forward studies on core-mantle interaction. Research works probing or simulating core/lower-mantle conditions by employing seismology, isotope fractionation, element partitioning, geodynamic modeling, thermodynamics, and other techniques, have significantly improved our understanding of these possible interactions, as well as their subsequent expression on the surface. At the same time, new ideas and models about the core-mantle boundary are emerging. We seek to organize a session that highlights the broad-scale study of the core and its interaction with the mantle in the Earth and other rocky planets. We invite contributions from a wide range of fields focusing on this multidisciplinary topic, including but not limited to geodynamics, seismology, mineral physics, and those presenting new theoretical/analytical or experimental techniques. Topics could include accretion, core-mantle differentiation, core crystallization and exsolution, lowermost mantle melting, geodynamo, plume dynamics, the nature of seismic anomalies at the core-mantle boundary, and heat and volatile transport. *Keynote speaker*: James Badro (Institut de Physique du Globe de Paris) Sincerely, Kind regards form the conveners: Juliane Dannberg, Rebecca Fischer, Yunguo Li, Anat Shahar ---------------------------------------------------------------------- Rebecca A. Fischer Clare Boothe Luce Assistant Professor Department of Earth and Planetary Sciences Harvard University rebeccafischer@g.harvard.edu <rebeccafischer@fas.harvard.edu> https://scholar.harvard.edu/raf ----------------------------------------------------------------------