David Dale Owen (24 June 1807 – 13 November 1860) was a prominent American geologist who conducted the first geological surveys of Indiana, Kentucky, Arkansas, Wisconsin, Iowa and Minnesota. Owen served as the first state geologist for three states: Kentucky (1854–57), Arkansas (1857–59), and Indiana (1837–39 and 1859–60). His first geological work was as an assistant mapping the geology of Tennessee in 1836. In addition, Owen was appointed as a U.S. geologist in 1839 and led federal surveys of Iowa, Wisconsin, and northern Illinois (1839–40) and in the Upper Midwest (1847-1851). Owen's greatest legacy lies in the eleven volumes of published reports from his state and federal geological surveys, which increased the general knowledge and understanding of American geology, the structural geo