Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin.
Aquifer basics [ More info] Links to general information on water supply by aquifers based on rock types and to principal national aquifers by name.
Arctic National Wildlife Refuge, 1002 Area, petroleum assessment, 1998, including economic analysis [ More info] Arctic National Wildlife Refuge (ANWR) 1002 area's petroleum resource assessment. Text available in PDF and HTML formats.
Asbestos: geology, mineralogy, mining, and uses [ More info] Report on asbestos, six types of mineral fibers belonging to two mineral groups, serpentines and amphiboles,with fiber morphology, crystal structure, analytical methods, properties, mining, milling, uses, and safety factors.(PDF file,28 pp.,4.5 MB)
Ask-A-Geologist [ More info] Site to submit a question to Ask-A-Geologist where scientists research the answers to the questions, then reply directly by email.
Assessment of Gas Hydrate Resources on the North Slope, Alaska, 2008 [ More info] We estimate that there are about 85 trillion cubic feet (TCF) of undiscovered, technically recoverable gas resources within gas hydrates in northern Alaska.
Assessment of In-Place Oil Shale Resources of the Green River Formation, Piceance Basin, Western Colorado [ More info] We estimated a total of 1.525 trillion barrels of oil are in place in seventeen oil shale zones in this area using a geology-based assessment methodology.
Assessment of In-Place Oil Shale Resources of the Green River Formation, Uinta Basin, Utah and Colorado [ More info] Using a geology-based assessment methodology, we estimated a total of 1.32 trillion barrels of oil in place in eighteen oil shale zones in this Eocene geologic unit.
Assessment of Moderate- and High-Temperature Geothermal Resources of the United States [ More info] The electric power generation potential from identified geothermal systems is 9,057 Megawattselectric (MWe), distributed over 13 states. Undiscovered resources are estimated to provide an additional 30,033 MWe.
Assessment of Paleozoic shale gas resources in the Sichuan Basin of China, 2015 [ More info] We estimated a mean of 23.9 trillion cubic feet of technically recoverable shale gas resources in Paleozoic formations in this area using a geology-based assessment methodology.
Assessment of Undiscovered Biogenic Gas Resources, North-Central Montana Province [ More info] We estimated 6,192 billion cubic feet of shallow biogenic (continuous) undiscovered gas in this area using a geology-based assessment methodology.
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