Complex sentence: Geothermometry is the measurement of temperature changes of the crust by using equilibrium of minerals that are insensitive to pressure variations; while geobarometry is the determination of the pressure changes using equilibrium of minerals that are of little dependence on temperature change.
Split into simpler sentences: Geothermometry is the measurement of temperature changes of the crust by using equilibrium of minerals that are insensitive to pressure variations. Geobarometry is the determination of the pressure changes using equilibrium of minerals that are of little dependence on temperature change.