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12. Geologic map of the Montara Mountain and San Mateo 7-1/2ʹ quadrangles, San Mateo County, California
13. Isopleth maps of iron, manganese, vanadium, and related elements in stream sediments of West Virginia
14. Isopleth maps of pH and alkalinity in stream waters, and sodium in stream sediments of West Virginia
15. Isopleth maps of titanium, aluminum, and associated elements in stream sediments of West Virginia
16. Isopleth maps of uranium, thorium, cerium, lanthanum, and related elements in stream sediments of West Virginia
17. Geologic map of the Tohono O'odham Indian Nation, southern Arizona
18. Sample data for the Geologic map of the island of Hawaii
19. Bedrock geologic map of the central block area, Yucca Mountain, Nye County, Nevada
20. Geologic map of the Red Bluff 30ʹ x 60ʹ quadrangle, California
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