UNION MEDALS, AWARDS AND PRIZES
Harry H. Hess Medal
Congratulations to last year’s UMAP Honorees!
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Past Recipients

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2023 RECIPIENT
Catherine A McCammon
Catherine A. McCammon has been a leading figure in the mineral physics of Earth’s interior throughout her career and has made numerous key discoveries on the redox state of Earth and crystal chemistry at high pressures and temperatures that have been...
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2022 RECIPIENT
Janne Blichert-Toft
Janne Blichert-Toft is a geochemist specializing in radiogenic isotopes and their applications to geochronology, planetary differentiation and, particularly, the evolution of the crust-mantle system of Earth. She is the acknowledged leader in geochem...
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2021 RECIPIENT
Peter B Kelemen
Peter Kelemen has integrated geologicobservations with geochemistry, geophysics, thermodynamics and continuum mechanics to reveal unexpected links between the dynamics and evolution of Earth’s crust and upper mantle and unveil a geological solution t...
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2020 RECIPIENT
Donald B Dingwell
2019 RECIPIENT
Richard J Walker
Richard J. Walker is the world leader in the field of highly siderophile (or iron-loving) element geochemistry. While this may sound rather esoteric, the impact of Walker’s geochemical and cosmochemical research has changed how we look at Earth’s his...
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2018 RECIPIENT
Timothy L Grove
The formation of igneous rocks is the fundamental process of planetary differentiation. Tim Grove is one of the world’s experts in igneous petrogenesis, having used a unique blend of fieldwork and laboratory experiments to make several key conceptual...
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2017 RECIPIENT
Roberta L Rudnick
Earth’s crust is important to us because we happen to live on it. It also contains more than half of Earth’s internal heat production, as well as most of its potassium and phosphorus. Its formation has left the residual mantle in a dramatically diffe...
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2016 RECIPIENT
Alexander Halliday
Alex Halliday is a pioneer in the application of isotopic techniques in geochemistry. The past few decades have seen remarkable developments that constrain the timing and nature of events in the early history of the solar system, and Alex has been on...
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