1. Onesquethawan stratigraphy (Lower and Middle Devonian) of northeastern Pennsylvania Author/Creator: Epstein, Jack Burton, 1935- Publication/Creation: Alexandria, VA : For sale by Distribution Branch, U.S. Geological Survey Resource Type: Book Access & Availability: Loading
2. Onesquethawan stratigraphy (Lower and Middle Devonian) of northeastern Pennsylvania Author/Creator: Epstein, Jack Burton, 1935- author Publication/Creation: Washington : Department of the Interior, U.S. Geological Survey, 1984 Resource Type: Book Access & Availability: Loading
3. Ordovician and Silurian Phi Kappa and Trail Creek Formations, Pioneer Mountains, central Idaho : stratigraphic and structural revisions, and new data on graptolite faunas Author/Creator: Dover, James H. Publication/Creation: Washington : U.S. Govt. Print. Off, 1980 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1086-1090. Access & Availability: Loading
4. The Ordovician system in Australia, New Zealand and Antarctica : correlation chart and explanatory notes Publication/Creation: Ottawa, Ont. : Available from IUGS Secretariat, 1981 Resource Type: Book Access & Availability: Loading
5. The ordovician system in Canada : correlation chart and explanatory notes Author/Creator: Barnes, Christopher R. Publication/Creation: Ottawa : IUGS Secretariat, 1981 Resource Type: Book Access & Availability: Loading
6. The Ordovician system in the United States : correlation chart and explanatory notes Publication/Creation: [Paris] : International Union of Geological Sciences, [1982] Resource Type: Book Access & Availability: Loading
7. Oregon geology Publication/Creation: [Portland] : Oregon Dept. of Geology and Mineral Industries Resource Type: Journal, Newspaper or Serial Access & Availability: Loading
8. Oregon geology Publication/Creation: Portland, Or. : Oregon Dept. of Geology and Mineral Industries Resource Type: Journal, Newspaper or Serial Access & Availability: Loading
9. Organic geochemistry Publication/Creation: [Oxford ; New York] : Pergamon Press, 1977- Resource Type: Journal, Newspaper or Serial Access & Availability: Loading
10. The Origin of the Gulf of Mexico and the early opening of the central North Atlantic Ocean : proceedings of a symposium at Louisiana State University, Baton Rouge, Louisiana, March 3-4-5, 1980 Publication/Creation: Baton Rouge, La. : Distributed by the School of Geoscience, Louisiana State University, 1980 Resource Type: Book Access & Availability: Loading