Inclusions yield a wealth of information on geological processes that otherwise would remain invisible at the whole rock scale, because they are protected by their host minerals that reduce or prevent post-formation alteration. Both hosts and inclusions have the capability to record pressure and temperatures of encapsulation, mantle metasomatic processes, magma genesis, mineral solubility, mineral growth, redox processes and mass and heat transfer. The correct interpretation of the geological record preserved in the inclusions – whether they are mineral, poly-phase, melt or fluid inclusions- requires careful microstructural and microchemical investigation of both inclusion and host. Recent methodological and technical advances, in particular in the analysis of solid and melt inclusions, have resulted in new ways of extracting this information. This session will be devoted to a presentation and discussion of new and revised methodologies for the measurement, analysis and geological interpretation of mineral, fluid and melt inclusions.