Triangular Plot

https://www.uwgb.edu/dutchs/Petrology/classification_of_igneous_rocks.htm

A triangular plot compares the similar and different aspects of three variables along an equilateral triangle which sum to a constant. the triangular plot above depicts the relationship between the ultramafic rocks with relative amounts of Olivine, Hornblende, and Pyroxene. If the rock is made up of more than 90% of any variable then it is classified as Dunite, Hornblendite, or Pyroxenite. This graph can serve a great purpose when attempting to determine the amount needed from each variable to create a particular final product.