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3321 results.

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Page 21, results 501 - 525

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Not all publications have extents, not all extents are completely accurate
Maps showing trace-element geochemistry of the Sangre de Cristo Wilderness Study Area, south-central Colorado
David R. Zimbelman
1989, Miscellaneous Field Studies Map 1635-C
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...
Lateral relationships in the Laki formation, Ganjo Takkar and Saidpur outlier, Hyderabad District, Sind Province, Pakistan
Roger E. Thomas, Mohammed Riaz Khan, Shafique Ahmed Khan
1989, Miscellaneous Field Studies Map 2084
The sections presented were measured in an unstudied area southeast of the city of Hyderabad and 175 km northeast of Karachi, capital of Sind Province in southern Pakistan.  These sections are preliminary to more detailed studies, particularly of the fossil fauna and the Paleocene and Eocene stratigraphy in southern Pakistan....
Geochemical survey of the Chattahoochee Roadless Area, Towns, Union, and White counties, Georgia
Robert P. Koeppen, Arthur E. Nelson
1989, Miscellaneous Field Studies Map 1502-B
Th U.S. Geological Survey made a reconnaissance geochemical survey of the Chattahoochee Roadless Area (fig. 1) to search for unexposed mineral deposits which might be recognized by a geochemical signature in the abundance or distribution patterns of trace elements. As part of a regional geochemical reconnaissance, M/ Hurst (University of...
Aeromagnetic maps of the Uinta and Piceance Basins and vicinity, Utah and Colorado
V. J. S. Grauch, Joseph L. Plesha
1989, Miscellaneous Field Studies Map 2008-C
In order to understand the evolution of sedimentary basins, it is important to understand their tectonic setting. In a U.S. Geological Survey (USGS) study of the Uinta and Piceance basins in Utah and Colorado, this understanding is approached through characterization of subsurface structure and lithology of a large region encompassing...
Map showing earthquake epicenters (1964-81) in Yellowstone National Park and vicinity, Wyoming, Idaho, and Montana
A.D. Pitt
1989, Miscellaneous Field Studies Map 2022
The earthquake activity in the Yellowstone region is part of a belt of seismicity extending from southern Utah to northwestern Montana. The 1959 magnitude 7.3 Hebgen Lake earthquake is the largest historical event along this trend. Yellowstone National Park is also the focus of extensive Quaternary volcanic activity that relates...
Map showing geochemical favorability for mesothermal base- and precious-metal veins in the Wallace 1° by 2° Quadrangle, Montana and Idaho
D. L. Leach
1989, Miscellaneous Field Studies Map 1354-C
This map shows the geochemical favorability for mesothermal base- and precious-metal veins in the Wallace 1° by 2° quadrangle, Montana and Idaho.  The information presented here is part of the Wallace CUSMAP (Conterminous United States Mineral Assessment Program) project conducted by the U.S. Geological Survey....