THE PROPOSED PROJECT WILL 1) TEST WHETHER HOT CHONDRULES ACCRETED TO FORM CLUSTER CHONDRITES AND PROVIDE ESTIMATES OF THE ACCRETION TEMPERATURE RELATIVE ANNEALING EXTENT AND SHOCK PRESSURE INVOLVED IN THEIR FORMATION 2) EVALUATE HOW TYPE 3 AND 4 CHONDRITES WERE COMPACTED HEATED AND LITHIFIED BY COLLISION-RELATED PROCESSES AND CONSTRAIN THEIR DEFORMATION AND THERMAL HISTORIES 3) ASSESS THE RELATIVE IMPORTANCE OF DIFFERENT HEATING MECHANISMS AND CONDITIONS AT DIFFERENT TIMES IN SOLAR SYSTEM HISTORY INCLUDING CONSTRAINTS ON THE DURATION OF ENDOGENICALLY HEATED ASTEROIDAL BODIES IN THE EARLY SOLAR SYSTEM AND THE ABILITY OF SHOCK EVENTS TO HEAT AND ANNEAL CHONDRITIC ROCKS. THIS PROJECT ALSO WILL PROVIDE AN UNPRECEDENTED CHARACTERIZATION OF HOW MINERALS RESPOND TO SHOCK ACROSS A RANGE OF SHOCK STAGES AND WILL UTILIZE METHODOLOGIES THAT CAN BE USED TO CHARACTERIZE THE DEFORMATION AND THERMAL HISTORIES OF RETURNED SAMPLES FROM ASTEROIDS. IT IS HIGHLY RELEVANT FOR NASA.