A trace-element geochemical study of the Sangre de Cristo Wilderness Study Area included the collection of 710 heavy-mineral-concentrate samples, 767 minus-80 mesh stream-sediment samples, and 145 rock samples. All samples were analyzed for 31 elements by semiquantitative emission-spectrographic methods, and some stream-sediment and rock samples were also analyzed for selected elements by wet che

January 1, 1989

Maps, sections, and structure-contour diagrams showing the geology and geochemistry of the Mouat nickel-copper prospect, Stillwater complex, Stillwater County, Montana

No abstract available.

January 1, 1989

Metallogenic map of significant volcanogenic massive-sulfide and related lode deposits in Alaska

No abstract available.

All Maps

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Maps showing distribution and abundance of selected elements in heavy-mineral concentrate samples from a reconnaissance geochemical survey of the Healy Quadrangle, Alaska

Maps showing distribution and abundance of selected elements in stream-sediment samples from a reconnaissance geochemical survey of the Healy Quadrangle, Alaska

Maps showing geologic and hydrologic factors affecting land-use planning in the Culpeper Basin, Virginia and Maryland

Maps showing percent of sandstone and total thickness of sandstone in the Westwater Canyon and Brushy Basin Members of the Morrison Formation, San Juan Basin, New Mexico

Maps showing Quaternary geology of the northern Maryland part of the Chesapeake Bay

Maps showing Quaternary geology of the northern Virginia part of the Chesapeake Bay

Maps showing Quaternary geology of the southern Maryland part of the Chesapeake Bay

Maps showing structure contours at the base of the Dakota Sandstone, paleotopographic contours at the base of the Westwater Canyon Member of the Morrison Formation, and inferred actively rising structures and depocenter axes during Jurassic time, San Juan

Maps showing the ratio of sandstone to mudstone and the number of mudstone interbeds in the Westwater Canyon Member of the Morrison Formation, San Juan Basin, New Mexico

Maps showing trace-element geochemistry of the Sangre de Cristo Wilderness Study Area, south-central Colorado

Maps, sections, and structure-contour diagrams showing the geology and geochemistry of the Mouat nickel-copper prospect, Stillwater complex, Stillwater County, Montana

Metallogenic map of significant volcanogenic massive-sulfide and related lode deposits in Alaska

U.S. Geological Survey

U.S. Department of the Interior