1. Cambro-Ordovician strata in northwest Georgia and southeast Tennessee, the Knox Group and the Sequatchie Formation Publication/Creation: Atlanta, Ga. : Georgia Geological Society, [1992] Resource Type: Book Access & Availability: Loading
2. Chitinozoa from the Ordovician Viola and Fernvale limestones of the Arbuckle Mountains, Oklahoma Author/Creator: Jenkins, W. A. M. Publication/Creation: London : Palaeontological Association, [1969] Resource Type: Book Access & Availability: Loading
3. The Chopawamsic Formation-- : a new stratigraphic unit in the Piedmont of northeastern Virginia Author/Creator: Southwick, D. L. 1936- (David Leroy) Publication/Creation: [Washington] : [U.S. Govt. Print. Off], [1971] Resource Type: Book Access & Availability: Loading
4. Composition, clay mineralogy, and diagenesis of the Simpson Group (Middle Ordovician), Grady County, Oklahoma Author/Creator: Pollastro, Richard M. Publication/Creation: [Washington, D. C.] : U.S. G.P.O. ; Denver, CO : For sale by the Books and Open-File Reports section, 1991 Resource Type: Book Access & Availability: Loading
5. Conodonts from subsurface Champlainian (Ordovician) rocks of eastern Indiana Author/Creator: Ethington, Raymond Lindsay, 1929- Publication/Creation: Bloomington, Ind. : Indiana Department of Natural Resources, Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
6. Cross sections of Lower Ordovician carbonate depositional lithofacies and Mississippi Valley-type zinc-and iron-sulfide mineralization in the Caulfield district, east-central part of Harrison 1⁰ x 2⁰ quadrangle, Arkansas and Missouri Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading