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12. Map of debris-flow probability, San Mateo County, California
13. Lithotectonic terrane map of the North American Cordillera
14. Isopleth maps of uranium, thorium, cerium, lanthanum, and related elements 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 pH and alkalinity in stream waters, and sodium in stream sediments of West Virginia
17. Isopleth maps of iron, manganese, vanadium, and related elements in stream sediments of West Virginia
18. Geologic maps of upper Cenozoic deposits in central California
19. Geologic map of upper Eocene to Holocene volcanic and related rocks of the Cascade Range, Oregon
20. Geologic map of upper Eocene to Holocene volcanic and related rocks in the Cascade Range, Washington
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