1. Geologic map of the Harrison 1⁰ x 2⁰ quadrangle, Missouri and Arkansas Yale Public content 1994. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). U.S. Dept. of the Interior, U.S. Geological Survey ; Open-File Reports Section, distributor. English. Public. Arkansas and Missouri.