Arizona, ground water

Robertson FN (1975) Hexavalent chromium in the ground water in Paradise Valley, Arizona. Ground Water... 

Bentley, H. W., Some comments on the use of chlorine-36 for dating very old ground water, In Workshop on dating old ground water, S. N. Davis, ed., Subcontract 19Y-55412v, report to Union Carbide Corp., Nuclear Division, by Department of Hydrology and Water Resources, University of Arizona, 138 p., 1978. 

Randall, J. H., Schultz, T. R., Davis, S. N., Suitability of fluorocarbons as tracers in ground water resource evaluation, unpublished Project Completion Report OWRT No. A-063, University of Arizona, 37 p., November, 1977. 

Kaufmann RS (1984) Chlorine in ground water Stable isotope distribution. PhD Dissertation, University of Arizona, Tucson, AZ... 

DBCP has been found In ground water In Hawaii, California, Arizona, South Carolina, and Maryland (5-7,19,77-79). Typical positives are 0.02-20 ppb. Areas with the highest frequency of positives and the highest well concentrations are the San Joaquin Valley In California and the region southwest of Phoenix, Arizona. The Hawaii contamination has occurred despite several hundred feet of overburden between the basal aquifer and the surface. One set of California soil core results show that ppb amounts of DBCP has leached about 15 m through the unsaturated zone ( ), whereas DBCP was not detected In another set of California soil cores sampled as deep as 10 m and five years after the last application (80). The latter results can possibly be explained by rapid movement of DBCP down the soil profile to depths greater than 10 m. 

Dickinson JE, Land M, Faunt CC, Leake SA, Reichard EG, Fleming JB Pool DR (2006) Hydrogeologic Framework Refinement, Ground-Water Flow and Storage, Water Chemistry Analyses, and Water-Budget Components of the Yuma Area, Southwestern Arizona and Southeastern California. USGS Scientific Investigations Report 2006-5135... 

Brown J. G., Bassett R. L., and Glynn P. D. (1998) Analysis and simulation of reactive transport of metal contaminants in ground water in Pinal Creek Basin, Arizona. In Special Issue—Reactive Transport Modeling of Natural Systems (eds. C. I. Steefel and P. van Cappellen). J. Hydrol. 209, 225 - 250. 

Brown, J.G., and Eychaner, J.H., 1988. Simulation of five ground-water withdrawal projections for the Black Mesa area, Navajo and Hopi Indian Reservations, Arizona. U.S. Geol. Survey Water-Resources Invest., 88-4000, 51 pp. 

Zhu, C., Waddell, R.K. Jr., Star, I., and Ostrander, M., 1998. Responses of ground-water in the Black Mesa, northeastern Arizona, to paleoclimate changes during late Pleistocene and Holocene. Geology, v. 26, pp. 27-130. 

Robertson, F.N. (1984) Solubility controls of fluorine, barium and chromium in ground water in alluvial basins of Arizona. Geological Survey Tucson, Water Resources Division. In First Canadian/American Conference on Hydrogeology Practical Applications of ground water geochemistry, 22-26 June 1984, Banff, Alberta, Canada, pp. 96-102. 

Subsequent to the experiments of Taylor et al. (1982) on sulphur gases derived from decomposing sulphide minerals, Hinkle et al. (1990) performed simulated weathering experiments on ground drill cores from the Santa Cruz porphyry copper deposit, Casa Grande, Arizona. Fresh, finely-ground samples were placed in sealed tubes, either in contact with a small quantity (0.8 ml) of water or exposed to water vapour but not in... 

Most jewels come from the earth. Whether it s turquoise from Arizona or gold from Mexico, rocks, gems, shells, and minerals are all part of nature s jewelry box. The jewelry you see in stores has been broken down or polished into smooth stones, much as wind and rain break and polish rocks into smaller pebbles. This process is called weathering. You can make your own nature jewelry out of the pretty and colorful pebbles you find on the ground. You can polish the pebbles you select the natural way rub the pebble against another rock, roll it in sand, use a tumbler to rinse it in, or wash it with water to smooth the surface and make it shine. You can also paint it with clear fingernail polish to make it shiny. 

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