About this issue

In this issue, Jibamitra Ganguly reminisces about his academic upbringing, and his “coming to America”. Mixed with some interesting stories, he reviews the historical development of the field of thermobarometry; its transition to geospeedometry; some early phase equilibrium controversies; and use and construction of petrogenetic grids. This is followed by a discussion of thermobarometry of natural samples and recent advances in palaeothermometry based on density functional theory. The final section deals with the concept of closure temperature (Tc), interpretation of age determined by some decay systems, and retrieval of thermal history of a rock by integrating geochronological and thermometric data with diffusion kinetic-crystal growth modelling.