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Page 5065, results 126601 - 126625

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Preliminary assessment of climatic change during Late Wisconsin time, southern Great Basin and vicinity, Arizona, California, and Nevada
W. G. Spaulding, S.W. Robinson, Frederick L. Paillet
1984, Water-Resources Investigations Report 84-4328
Nine plant macrofossil assemblages from the Eleana Range-2 packrat (Neotoma sp.) midden span 6,500 radiocarbon years and record local vegetational changes in the southern Great Basin of Nevada during the last one-half of the Late Wisconsin glacial age. Climatic reconstructions were developed to account for these changes. During the late...
A ground-water-quality monitoring network for the Lower Mojave River Valley, California
L. R. Woolfenden
1984, Water-Resources Investigations Report 83-4148
A ground-water-quality monitoring network was developed for the Lower Mojave River valley to define the ground-water quality of the valley. Basin geohydrology, geology, land use and water-level and water-quality data were factors considered in developing objectives for an ideal network. These objectives were used in selecting well locations for the...
Water-quality appraisal, Mammoth Creek and Hot Creek, Mono County, California
J. G. Setmire
1984, Water-Resources Investigations Report 84-4060
A late summer reconnaissance in 1981 and a spring high-flow sampling in 1982 of Mammoth Creek and Hot Creek, located in the Mammoth crest area of the Sierra Nevada, indicated that mineralization, eutrophication, sedimentation, and limited areas of fecal contamination were occurring. Mineralization, indicated by a downstream increase in dissolved-solids...
Spectral analysis of aeromagnetic profiles for depth estimation principles, software, and practical application
H.S. Sadek, S.M. Rashad, H. R. Blank
1984, Open-File Report 84-849
Fourier spectral analysis in recent years has become a widely utilized tool for the processing and interpretation of potential field data. It is particularly well suited to analysis of aeromagnetic maps and profiles, where coverage commonly is of broad scope and statistical treatment is appropriate. The techniques developed by earlier workers...
Geology and hydrothermal alteration at the Madh adh Dhahab epithermal precious-metal deposit, Kingdom of Saudi Arabia
J. L. Doebrich, J.P. LeAnderson
1984, Open-File Report 84-640
Mahd adh Dhahab is a late Precambrian epithermal gold-silver-base metal deposit located in the west-central part of the Arabian Shield. North-trending quartz veins containing base and precious metals cut an east-striking, north-dipping homoclinal sequence of volcanic, volcaniclastic, and epiclastic rocks of intermediate to felsic composition. Ore was localized where the...