USGS: Science Topics: elements

Science Topics

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Elements

Chemical elements and element groups

Subtopics:
Chemical elements (56 items)
Chemical element groups (6 items)

Results 1 - 5 of 56 listed alphabetically [list by similarity]

A methodology for conducting national-scale alluvial diamond resource potential and production capacity assessments, with a focus on artisanal mining [More info]: Geologic evidence, combined with geographical data and analyized through a geographic information system allows us to compare production statistics with likely resource estimates.
Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [More info]: Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
Arsenic in ground water of the United States [More info]: Arsenic is a naturally occurring element in rocks, soils, and the waters in contact with them. It is found in ground water as the result of minerals dissolving from weathered rocks and soils. This site links to data, maps, and more.
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico [More info]: Explains the natural and human-affected factors that determine the concentration of contaminants in groundwater, especially where the concentration is different at the surface than at depth, and where pumping varies with time.
Beryllium--important for national defense [More info]: How this element is used, where we get it, and prospects for worldwide supply and demand.

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