The AGES lab, located in the Gary C. Comer Geochemistry Building at Lamont-Doherty Earth Observatory, is primarily dedicated to using the 40Ar/39Ar approach to dating potassium-bearing minerals. Our particular foci are on sedimentary tracer studies and high precision geochronology for sequencing Earth history. Additionally, we use the 40Ar/39Ar system to precisely date igneous rocks to constrain the timing and rates of important geological processes.