Explore the mineralogy of Mars through a 24-minute talk by Harry McSween from the University of Tennessee, Knoxville. Delve into the analysis of Martian meteorites and their unique characteristics, including shock-implanted gases matching Mars' atmospheric composition and distinctive oxygen isotopic fingerprints. Examine how these meteorites constrain the planet's bulk composition, volatile inventory, and mantle sources. Compare findings from meteorites with data collected by Mars rovers, revealing differences in mantle source compositions. Investigate the absence of calc-alkaline rocks and Earth-like continental crust on Mars, suggesting a lack of plate tectonics. Gain insights into the planet's basaltic nature and the diverse ancient mantle sources reflected in its sediments and cumulates.