BLACKWELDER, ELIOT (188o— ), American geolo gist, was born in Chicago, Ill., on June 4, 1880. He graduated at the University of Chicago in 1901 and in 1914 received the degree of doctor of philosophy from that institution. From 1902 until 1919 he was instructor or professor in the universities of Chicago, Wisconsin and Illinois and was a member of the U.S. geological survey. In 1922 he became professor of geology in Stanford university.
Among his publications are Elements of Geology (with H. H. Barrows, 1911) and Regional Geology of the United States (1912).