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22. Isopleth maps of pH and alkalinity in stream waters, and sodium in stream sediments of West Virginia
23. Isopleth maps of titanium, aluminum, and associated elements in stream sediments of West Virginia
24. Isopleth maps of uranium, thorium, cerium, lanthanum, and related elements in stream sediments of West Virginia
25. Lithotectonic terrane map of the North American Cordillera
26. Map of debris-flow probability, San Mateo County, California
27. Maps and seismic profiles showing thickness and distribution of postglacial deposits beneath the southern two-thirds of Lake Michigan
28. Maps showing metallic mineral districts and mines in the Black Hills, South Dakota and Wyoming
29. Maps showing seismicity and tectonic stresses along the Eurasia-Africa plate boundary
30. Maps showing the sea-floor topography of eastern Georges Bank
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