Scientific study of the formation, location, and use of marketable geologic materials including fuels, metals, minerals, and water.
Nahcolite Resources in the Green River Formation, Piceance Basin, Northwestern Colorado [ More info] Resource assessment of nahcolite, a mineral with a variety of industrial uses, which occurs with oil shale and is affected by the processes used to recover hydrocarbons from the rock.
National Coal Assessment [ More info] The USGS National Coal Assessment provides a quantitative study of the nation's coal endowment. Links to digital publications with maps for the Illinois Basin, Colorado, Arizona, Utah, and New Mexico, and Wyoming, Montana, and North Dakota.
National Coal Resource Assessment: Geologic assessment of coal in the Colorado Plateau: Arizona, New Mexico, and Utah [ More info] Coal resources, stratigraphy, geochemistry, coal quality and geology of coal in the Colorado Plateau, Arizona, New Mexico and Utah. Text in PDF format and available on CD-ROM.
National Coal Resources Data System - US Coal Quality Database [ More info] Searchable database, the COALQUAL database, presented here and in the USGS Open-file Report 97-134, is a subset of samples contained in the NCRDS (National Coal Resources Data System) database, and contains coal quality data on each sample.
National Coal Resources Data System - US Coal Resource Database (USGCOAL) [ More info] Searchable database for locating information on coal resources by area, coalfield, coalbed, rank, quadrangle, source, years, or characteristics of thickness, overburden, and reliability.
National Oil and Gas Assessment [ More info] Links to oil and gas assessment maps of major basins in the United States and to related publications, and products.
National Petroleum Reserve Alaska Legacy Data Archive [ More info] Access is provided to seismic data, image files of seismic data, well logs, and cores of petroleum reserves in Alaska from the National Petroleum Reserve, Alaska, and (NPRA) Legacy Data Archive.
Natural gas hydrates: vast resources, uncertain future [ More info] Fact sheet (PDF format) on gas hydrates occurrence, recovery, and use as an energy source.
Nickel - Makes stainless steel strong [ More info] Uses, sources, and history of Nickel as a mineral commodity.
Niobium and tantalum: indispensable twins [ More info] Explains why these elements are commonly discussed together, how they are used, where we get them, and prospects for future supply and demand.
Alphabetical Index of Topics
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