Frank Fitch Grout

Frank Fitch Grout (January 24, 1880, Rockford, Illinois – August 1, 1958, Minneapolis) was an American petrographer, geologist, and mineralogist. He is perhaps best known for introducing the term ''lopolith'' into the science of geology. The mineral groutite is named in Grout's honor (based upon a 1945 discovery by John Walter Gruner). Provided by Wikipedia