Chemical elements and element groups
Groundwater quality in the San Diego Drainages Hydrogeologic Province, California [ More info] Vanadium and boron were detected at high and moderate concentrations in this area. High concentrations for these constituents were detected almost exclusively in samples collected in the Temecula Valley study area.
Groundwater quality in the north San Francisco Bay groundwater basins, California [ More info] Summary of chemical constituents of ground water that are of concern to human activity in this area. Arsenic is the constituent that occurs most frequently in high concentrations.
Investigating atmospheric mercury with the U.S. Geological Survey mobile mercury laboratory [ More info] Explains sources of mercury in the air, ways in which mercury is concentrated in animals, and describes how we measure deposition of atmospheric mercury, with summaries of observations.
Lead Poisoning in Wild Birds [ More info] Even though lead usage has declined due to environmental awareness and regulation, several human sources of lead continue to affect birds. Hunting ammunition and fishing gear are ingested by the birds, with toxic effects.
Lead-Soft and easy to cast [ More info] Explains how we use lead, where it comes from, and how we might ensure that we have adequate supplies of this mineral commodity in the future.
Mercury Concentrations in Streams Found to Go Through Daily Cycles [ More info] Research findings and examples of application to real problems--highly variable conditions cause the production of toxic methyl mercury in the environment which accumulates in fish.
Mercury and halogens in coal--Their role in determining mercury emissions from coal combustion [ More info] Explains the complex relationships between coal, mercury, and halogens in light of ongoing efforts to reduce the emission of mercury into the environment.
Nickel - Makes stainless steel strong [ More info] Uses, sources, and history of Nickel as a mineral commodity.
Nutrients in the Nation's streams and groundwater: National findings and implications [ More info] Despite public sector efforts to reduce nonpoint-source nutrients in streams and rivers, concentrations have remained the same or increased, continuing to pose risks to aquatic life and human health.
Occurrence, distribution, and concentrations of selected contaminants in streambed- and suspended-sediment samples collected in Bexar County, Texas, 2007-09 [ More info] Study showing which chemicals found in sediments were most common, with methods used and likely consequences of their high concentrations.
Periodic table page [ More info] An "image map" periodic table and short notes about many isotopes and their applications to illustrate the uses of assorted isotopes in hydrology, geology, and biology.
Phosphorus and groundwater: Establishing links between agricultural use and transport to streams [ More info] Explains why phosphorus is important, how it moves through the terrestrial water system, how we measure it, and what this means for people who need to manage or monitor human activities that produce it.
Preliminary Assessment of Non-Fuel Mineral Resources of Afghanistan, 2007 [ More info] Estimates of known and undiscovered copper resources total nearly 60 million metric tons of copper. Iron resources in known deposits total 2200 million metric tons of ore. Twenty mineralized areas meriting further study were identified.
Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions [ More info] Knowledge of the geochemical processes controlling radium occurrence in groundwater may help water-resource managers anticipate and minimize human exposure to this cancer-causing element.
Radon in earth, air, and water [ More info] Links to USGS publications, bibliographies, and maps on radon in the U.S., plus links to non-USGS sites with information on radon.
Rare earth elements--End use and recyclability [ More info] Rare earth element use is changing with technology. This report explains how we use them and the prospects for recycling these important commodities.
Reservoir sediment studies in Kansas [ More info] Report of completed reservoir sediment studies in Kansas using a combination of bathymetric surveying, sediment coring, chemical analysis, and statistical analysis to understand the quantity and quality of deposited sediment.
Selenium and stable isotopes of carbon and nitrogen in the benthic clam Corbula amurensis from Northern San Francisco Bay, California: May 1995-February 2010 [ More info] Monthly selenium concentration in this keystone species shows strong spatial and seasonal variation in a five-year series of analyses.
The concept of geologic carbon sequestration [ More info] Explains securing carbon dioxide in deep geologic formations to prevent its release to the atmosphere and contribution to global warming as a greenhouse gas.
The future of rare earth elements--will these high-tech industry elements continue in short supply? [ More info] Presentation describing uses of rare earth elements, why they are important, where they occur and are produced, and aspects of the economics of production and consumption with emphasis on sites that might be developed for production.
Alphabetical Index of Topics
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