👉 In the context of geology, "greenstone" refers to a type of metamorphic rock that is characterized by its smooth and rounded appearance. These rocks are formed from the transformation of igneous rocks during the process of metamorphism. The term "greenstone" was first used in 1950s when it was coined by British geologist John Eddington, who described greenstone as a type of sedimentary rock that had been transformed into a mineral. Greenstone is often
