Dear Colleagues, We would like to bring your attention to our session—"Reading the Record of Tectonic Processes through Diverse Investigations of Igneous and Metamorphic Rocks—to be held at the North-Central GSA meeting later this year: May 4-5, Grand Rapids, Michigan. In addition to our session, there are several other wonderful sessions that feature mineralogy, petrology, or tectonics and might interest you. Full session descriptions are below. The full list of technical sessions is linked here: https://www.geosociety.org/GSA/Events/Section_Meetings/GSA/Sections/nc/2023mtg/techprog.aspx . It is shaping up to be a great meeting and wonderful opportunity to bring folks together from across our midwestern petrology, mineralogy, and tectonics community. We hope to see you and your students there! https://www.geosociety.org/GSA/Events/Section_Meetings/GSA/Sections/nc/2023mtg/home.aspx Sincerely, Robert Holder (University of Michigan) Hannah Blatchford (Eastern Michigan University) T29. Reading the Record of Tectonic Processes through Diverse Investigations of Igneous and Metamorphic Rocks —Magmatism and metamorphism are the processes by which Earth has differentiated and changed through time. The record of these changes is stored in igneous and metamorphic rocks. We seek abstracts that use diverse datasets to evaluate the history of igneous and metamorphic rocks and the tectonic processes that they record. T25. Future Directions in Mineralogy and Petrology: A Session for Undergraduate and Graduate Researchers. —This session aims to enhance communication and collaboration among early career researchers, especially undergraduate and graduate students. This session will highlight innovative and interdisciplinary work to provide fresh perspectives, new ideas, and creative answers to mineralogical and petrologic problems. We welcome submissions from all areas of mineralogy and petrology. T28. Critical Minerals in North-Central United States: Exploration, Mining, and Processing. —For the economic prosperity and national defense of the United States, a consistent supply of critical minerals is essential. The U.S. Geological Survey has identified 50 “critical minerals” that are essential to economic or national security and have supply chains that are vulnerable to disruption. A number of critical minerals are known to exist in the North-Central U.S., but they have either not been adequately identified by exploration or require new technology in order to make their production economic. This session focuses on innovative exploration techniques to discover these deposits, and on novel mining and processing methods to make critical mineral businesses profitable in the north-central U.S. T30. Granites and Rhyolites as a Record of Crustal Magmatic Processes. —Felsic magmatism, both in the crust and on the surface, have a wide range of magma sources and processes representing the diversity of crustal igneous systems. We seek contributions investigating the complexities of crustal magmatism. Contributions exploring processes, time scales, and ore-related deposits related to granites and rhyolites are particularly welcome. T31. The Origin of Compositional and Thermal Heterogeneity within Earth’s Interior. —From the asthenosphere to the inner core, numerous heterogeneities have been observed. These variations have limited—no natural samples exposed on Earth’s surface—and their investigation requires collaboration between geochemists and geophysicists. This session welcomes all contributions from experimentalists, seismologists, and geodynamicists investigating compositional and thermal variation within the mantle or core. -- Hannah J. Blatchford, PhD (she/her) Assistant Professor Department of Geography & Geology Eastern Michigan University