 Gazzi-Dickinson point counting is used in the creation of ternary diagrams, such as QFL diagrams.To perform a point count using the Gazzi-Dickinson method, a randomly selected thin section from a sedimentary rock is needed, with a slide advance mechanism that will randomly select points on the slide with a petrographic microscope.A minimum of 300 representative points (preferably 500 points) should be used to perform the count.