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Map showing the distribution of minerals in the heavy-mineral concentrate of stream sediments in the Sierra Ancha Wilderness and Salome Study Area, Gila County, Arizona
R. B. Tripp, H. N. Barton, J.C. Negri, P. K. Theobald
1980, Miscellaneous Field Studies Map 1162-E
Reconnaissance geochemical and mineralogical sampling was done in the Sierra Ancha Wilderness and Salome Study Area during April and May 1978. This map shows the distribution of chalcopyrite, florite, galena, scheelite, and lead-rich iron oxides in the nonmagnetic fraction of the heavy-mineral concentrate of stream sediment samples collected during the...
A one-dimensional, steady-state, dissolved-oxygen model and waste-load assimilation study for Little Lick and Big Lick Creeks, Blackford and Delaware counties, Indiana
James G. Peters, Charles G. Crawford, William G. Wilber
1980, Open-File Report 80-73
The Indiana State Board of Health is developing a State water-quality management plan that includes establishing limits for liquid wastes discharged into Indiana streams. A digital computer model was used to predict alternatives for future waste loadings on Little Lick and Big Lick Creeks that would be compatible with Indiana...
Geohydrology and model analysis for water-supply management in a small area of west-central Kansas
Lloyd E. Dunlap, Jack Kume, James G. Thomas
1980, Water-Resources Investigations Report 80-91
The Ogallala Formation in the intensive-study area, an area of 12 square miles in northeastern Wichita County, west-central Kansas, has had a substantial decrease in saturated thickness since the development of irrigation. The annual water-level decline during 1950-78 ranged from 1.08 to 2.22 feet per year.The hydrologic system was investigated...
Biological premonitors of earthquakes: A validation study
Leon Spelly Otis, W.H. Kautz
1980, Open-File Report 80-1152
For the greatest ultimate usefulness to society, the two most important facets of earthquake prediction are (1) a fundamental scientific understanding of the earthquake-triggering process and (2) the identification of reliable and measurable premonitors. A possible approach to both of these problem areas, and one that has received almost no...
Effects of urbanization on the water quality of lakes in Eagan, Minnesota
M. A. Ayers, G. A. Payne, Mark A. Have
1980, Water-Resources Investigations Report 80-71
Water-quality characteristics of 17 lakes and ponds in the city of Eagan were described from data collected from 1972 through 1978. The data showed that differences in water quality between lakes were related to differences in the percentage of urbanization. However, water-quality variations within each lake were affected more by...