1. Geologic map of the St. Joe quadrangle, Searcy and Marion Counties Author/Creator: Hudson, Mark R. Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2009 Resource Type: Map Access & Availability: Loading
2. Geologic map of the Boxley quadrangle, Newton and Madison Counties, Arkansas Author/Creator: Hudson, Mark R. Publication/Creation: Denver, Colo. : U.S. Geological Survey, 2007 Resource Type: Map Edition: Version 1.0, posted Dec. 2007. Access & Availability: Loading
3. Geologic map of the Western Grove quadrangle, northwestern Arkansas Author/Creator: Hudson, Mark R. Publication/Creation: Denver, Colo. : U.S. Geological Survey, 2006 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading
4. Geologic map of the Hasty quadrangle, Boone and Newton Counties, Arkansas Author/Creator: Hudson, Mark R. Publication/Creation: [Reston, Va.?] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Information Services [distributor], 2004 Resource Type: Map Edition: Version 1.0. Access & Availability: Loading