Hatten Yoder

Hatten Schuyler Yoder Jr. (1921 to 2003) was an American geophysicist and experimental petrologist who did pioneering work on minerals under high pressure and temperature, and was noted for his study of silicates and igneous rocks. Born in Cleveland, Ohio, he was educated at the University of Chicago and the Massachusetts Institute of Technology. He served as the fourth Director of the Carnegie Institution of Washington's Geophysical Laboratory, from 1971 to 1986, and wrote the laboratory's volume in the Centennial History of the Carnegie Institution of Washington. His honours include election to the United States National Academy of Sciences in 1958, the Arthur L. Day Medal of the Geological Society of America in 1962, the Wollaston Medal of the Geological Society of London in 1979, and the Roebling Medal in 1992. He died in Bethesda, Maryland in 2003.