Two postdoctoral positions have opened in my group focused on trace element-mineral interactions. This is part of a collaborative project investigating the role of mineral surfaces and structures in controlling the geochemistry of rare earth and platinum group elements in weathering environments. Details about the positions, including how to apply, are available at: http://aqgeochem.wustl.edu/images/TwoPostdocs_TraceElementsMinerals_WU2021.pdf -- Jeffrey G. Catalano, Professor Department of Earth and Planetary Sciences Washington University 1 Brookings Drive, Campus Box 1169 Saint Louis, MO 63130, USA Tel: +1 314 935-6015 Fax: +1 314 935-7631 http://aqgeochem.wustl.edu/