Robert G. Coleman (January 5, 1923 â October 18, 2020) was an American geologist.
He was a member of the United States National Academy of Sciences. His primary field of expertise was the formation and tectonic setting of ophiolites and ultramafic rocks. He was a retired professor of Geology from Stanford University and retired from the U.S. Geological Survey. He continued to conduct research and publish scientific books and articles.