This Project Grant from the National Science Foundation Division of Earth Sciences Geosciences program (CFDA 47.050) provides $491,846 to the University of Washington to acquire a clumped isotope gas-source isotope-ratio mass spectrometer and carbonate sample preparation device. This new instrumentation will advance interdisciplinary Earth sciences research and education through precise temperature and chemical analysis of carbonate minerals formed in soils, oceans, fault zones and other environments. Analyses of corals and shelled organisms will support environmental and marine research. The mass spectrometer and sample preparation system will enable high-precision stable isotopic analysis of small carbonate samples to study past climate, tectonics, geochemistry and other disciplines. This infrastructure investment is expected to substantially enhance essential Earth sciences research and contribute to scientific discovery and workforce development in STEM fields through inclusive undergraduate training opportunities.