Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth.
Isotope and Chemical Methods in Support of the U.S. Geological Survey Science Strategy, 2003-2008 [ More info] Types of geochemical and isotopic analyses used in conducting a variety of research studies in USGS, primarily focused on mineral deposit formation.
Johnson Creek basin hydrologic monitoring [ More info] Hydrologic data and analyses of surface-water, water quality, and ground water in the Johnson Creek basin in Oregon.
Lake monitoring field manual [ More info] Handbook on monitoring methods for lake management, including program design, sampling methods and protocol, biota and chemical sampling methods, laboratory methods, preservation of data and samples, glossary, and bibliography. (PDF file, 92 pp.)
Lake Pontchartrain basin: bottom sediments and related environmental resources [ More info] This publication focuses on the geological framework and sedimentary processes of the Lake Pontchartrain Basin and provides links to interactive tools, regional research, and sediment data in GIS formats for display and analysis.
Lake Roosevelt-Upper Columbia River environmental studies [ More info] Description of research studies of the Lake Roosavelt-Upper Columbia area on contaminants and effects on environmental health with links to publications and products, partners, related links, project summaries, and contacts.
Liquid Chromatography/Mass Spectrometry (LC/MS) [ More info] Description of technique and equipment for high-performance liquid chromatography (HPLC) used to identify organic compounds in chemical analysis.
Lower Columbia River dissolved gas monitoring network [ More info] Links to real-time data for total dissolved gas, temperature, and barometric pressure in lower Columbia River in Oregon and Washington and to project reports.
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.
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.
Microbial production of natural gas from coal and organic-rich shale [ More info] Explains how natural gas can be formed by microorganisms from geological materials, and how we plan to assess the potential value of this process for improving energy resources.
Alphabetical Index of Topics
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