EXPERIMENTAL SIMULATION OF LUNAR MAGMA OCEAN CRYSTALLIZATIONTHIS PROPOSAL REQUESTS SUPPORT FOR A PROGRAM OF HIGH-PRESSURE EXPERIMENTATION TO SIMULATE THE CRYSTALLIZATION OF AN EARLY LUNAR MAGMA OCEAN. DESPITE THE WIDESPREAD ACCEPTANCE OF THE GIANT IMPACT LUNAR MAGMA OCEAN CONCEPT TO UNDERSTAND THE GEOLOGIC HISTORY OF THE MOON CRYSTALLIZATION OF THE MAGMA OCEAN HAS NEVER BEEN TESTED EXPERIMENTALLY. THE RESEARCH PROPOSED HERE WILL DO THIS THEREBY PROVIDING STRONGER CONSTRAINTS ON SUCH IMPORTANT UNRESOLVED QUESTIONS IN LUNAR SCIENCE AS: WHAT WAS THE EXTENT OF THE INITIAL LUNAR MAGMA OCEAN? DID THE ENTIRE MOON MELT OR ONLY THE UPPER FEW HUNDRED KM OR SOMETHING IN BETWEEN? WHAT IS THE RELATIONSHIP BETWEEN THE COMPOSITIONS AND DEPTHS OF SOURCE ROCKS FOR MARE BASALTS VS. THOSE FOR PICRITIC GLASS BEADS? WHAT IS THE ORIGIN OFMAGNESIAN KREEP-RICH BASALTS? THE EXPERIMENTS PROPOSED HERE WILL BE PERFORMED UNDER APPROPRIATE CONDITIONS OF TEMPERATURE PRESSURE AND OXYGEN FUGACITY TO ALLOW BETTER UNDERSTANDING OF THE INTERNAL STRUCTURE AND COMPOSITION OF THE MOON. RESULTS FROM THE PROPOSED EXPERIMENTS CAN THEN BE INTEGRATED WITH TREATMENTS OF POST-MAGMA OCEAN PROCESSES SUCH AS CUMULATE OVERTURN TO STRENGTHEN THE FRAMEWORK IN WHICH LUNAR SAMPLES BOTH THOSE ALREADY IN OUR POSSESSION AND THOSE THAT MAY BE RETURNED IN FUTURE ROBOTIC AND HUMAN MISSIONS MAY BE UNDERSTOOD.