21. Generalized potentiometric surface of the Sparta-Memphis aquifer, eastern Arkansas, spring 1980 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Little Rock, Arkansas : Department of the Interior, U.S. Geological Survey, 1987 Resource Type: Map Access & Availability: Loading
22. Generalized potentiometric surfaces of the Red River alluvial aquifer, pool 1, Red River Waterway Area, central Louisiana Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Baton Rouge, Louisiana : U.S. Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Map Access & Availability: Loading
23. Generalized potentiometric-surface map of the High Plains Aquifer in Wyoming, 1981 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Cheyenne, Wyo.] : Department of the Interior, United States Geological Survey, 1984 Resource Type: Map Access & Availability: Loading
24. Generalized surficial geologic map of the Pueblo 1⁰ x 2⁰ quadrangle, Colorado Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : Information Services [distributor]. Resource Type: Map Access & Availability: Loading
25. Generalized thermal maturity map of Alaska Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by U.S. Geological Survey, Information Services Resource Type: Map Access & Availability: Loading
26. Generalized thickness and configuration of the top of the intermediate aquifer, west-central Florida Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Tallahassee, Fla.] : Department of the Interior, United States Geological Survey, 1984 Resource Type: Map Access & Availability: Loading
27. A geochemical investigation of selected areas in Greenville and Laurens counties, South Carolina--implications for mineral resources Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
28. Geochemical map showing the distribution of gold in the Anchorage 1⁰ x 3⁰ quadrangle, Alaska Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
29. Geochemical maps showing distribution of anomalously abundant elements in stream-sediment and glacial-moraine samples from the Anchorage 1⁰ x 3⁰ quadrangle, southern Alaska Author/Creator: Geological Survey (U.S.) Publication/Creation: Fairbanks, AK : For sale by Alaska Distribution Section Resource Type: Map Access & Availability: Loading
30. Geochemical maps showing distribution of anomalously abundant elements in the nonmagnetic, heavy-mineral-concentrate fraction of stream sediment from the Anchorage 1⁰ x 3⁰ quadrangle, southern Alaska Author/Creator: Geological Survey (U.S.) Publication/Creation: Fairbanks, AK : For sale by Alaska Distribution Section Resource Type: Map Access & Availability: Loading