Doyle is one of the finest examples of Woodland culture in the Republican River valley of southwest Nebraska and northwest Kansas. Work at the site uncovered a superb example of a Woodland house floor. Artifacts, particularly pottery vessels, attribute the occupation to the Keith Phase (A.D. 500-1000), the only known Woodland culture in southwest Nebraska. Radiocarbon dates suggest two separate occupations, the first about A.D. 50 and another about A.D. 550-600. These dates offer preliminary evidence of Woodland culture emerging in the Republican basin five centuries earlier than previously thought. The Doyle Site is listed on the National Historic Register.