The thin sections of rock presented in this gallery, 25 to 30 micrometers thick, are observed under a polarizing microscope, either in polarized light (PL) or in analyzed light (LA). I particularly like these geological objects. It is my job as a petrographer (from the Greek “petros”, stone) to observe them and make them tell their story. Curious visitors who would like to know more about one or other of these thin sections (mineralogy, formation conditions, geological context, etc.) can contact me or consult the books in which these watercolors are published.
