Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Effects of hydropower development on Columbia River salmonids
No abstract available
Authors
D.W. Rondorf, G.A. Gray, W.R. Nelson
EFFECTS OF LOCALIZED AQUIFER BOILING ON FLUID PRODUCTION AT CERRO PRIETO.
Localized aquifer boiling in the shallow two-phase reservoir of Cerro Prieto has produced excess steam and increased electrical output. Unfortunately it has also caused near-well mineral deposition that has decreased permeability and fluid flow. Inflow of cold water has limited the extent of aquifer boiling and permeability loss. The deeper reservoir at Cerro Prieto may need injection of cold wate
Authors
Alfred H. Truesdell, Franco D'Amore, David Nieva
EFFECTS OF RESOURCE DEVELOPMENT ON WATER QUALITY IN THE BIG SOUTH FORK NATIONAL RIVER AND RECREATION AREA, TENNESSEE AND KENTUCKY.
The South Fork Cumberland River begins in Tennessee at the confluence of the New River and Clear Fork. Strip mining for coal in the New River basin has been ongoing for decades with little reclamation prior to 1977. Water-quality data show that suspended-sediment and dissolved-constituent loads from the New River dominate the water quality in the National River and Recreation Area. The suspended s
Authors
William P. Carey
EVALUATION OF LOW-SUN ILLUMINATED LANDSAT-4 THEMATIC MAPPER DATA FOR MAPPING HYDROTHERMALLY ALTERED ROCKS IN SOUTHERN NEVADA.
Landsat-4 Thematic Mapper (TM) data of southern Nevada collected under conditions of low-angle solar illumination were digitally processed to identify hydroxyl-bearing minerals commonly associated with hydrothermal alteration in volcanic terrains. Digital masking procedures were used to exclude shadow areas and vegetation and thus to produce a CRC image suitable for testing the new TM bands as a m
Authors
Melvin H. Podwysocki, Marty S. Power, Jack Salisbury, O. D. Jones
Evolution of the MOSS geographic information system for 32-bit computer systems
The authors discuss the current status and plans regarding the 32-bit implementation of the Map Overly and Statistical System (MOSS) geographic information system. Increasing interest in this system is promoting significant expansion of its capabilities, but any such enhancements will require careful analysis and planning to ensure that the resulting system is functionally complete and efficient y
Authors
R.J. Thompson, Lyndon R. Oleson
FEDERAL MINERAL LAND INFORMATION SYSTEM.
The ability of geographic information systems to combine point, line, and areal data has been widely documented, although the establishment of a particular data base presents its own unique problems. The U. S. Geological Survey is developing a geographic information system consisting of information on Federal surface ownership, Federal subsurface mineral rights, location of actual mineral occurren
Authors
Richard L. Kleckner
Ferromanganese crust resources in the Pacific and Atlantic Oceans
Ferromanganese crusts on raised areas of the ocean floor have joined abyssal manganese nodules and hydrothermal sulfides as potential marine resources. Significant volumes of cobalt-rich (about 1% Co) crusts have been identified to date within the US Exclusive Economic Zone (EEZ) in the Central Pacific: in the NW Hawaiian Ridge and Seamount region and in the seamounts in the Johnston Island and Pa
Authors
R.F. Commeau, A. Clark, Chad Johnson, F. T. Manheim, P. J. Aruscavage, C.M. Lane
GEOLOGIC APPLICATIONS OF SIDE-LOOKING AIRBORNE RADAR DATA IN THE CENTRAL APPALACHIAN MOUNTAINS.
Side-looking airborne radar has provided a sufficiently detailed synoptic view of the central Appalachian Mountains that the images give an unparalleled representation of the size and nature of the folds within the Valley and Ridge province. The radar data show that fold wavelengths decrease abruptly south of the region of the Pennsylvania, Maryland, and West Virginia State lines. Concomittantly,
Authors
Howard A. Pohn, C. Scott Southworth
GIRAS TO MOSS INTERFACE.
An analysis of land use change for an area in Boulder County, Colorado, was conducted using digital cartographic data. The authors selected data in the Geographic Information Retrieval and Analysis System (GIRAS) format which is digitized from the 1:250,000-scale land use and land cover map series. The Map Overlay and Statistical System (MOSS) was used as an analytical tool for the study. The auth
Authors
Thomas P. DiNardo, R. Alan Jackson
HOT WATER DRILL FOR TEMPERATE ICE.
The development of a high-pressure hot-water drill is described, which has been used reliably in temperate ice to depths of 400 meters with an average drill rate of about 1. 5 meters per minute. One arrangement of the equipment weighs about 500 kilograms, and can be contained on two sleds, each about 3 meters long. Simplified performance equations are given, and experiments with nozzle design sugg
Authors
Philip L. Taylor
HYDRAULIC RESEARCH - U. S. GEOLOGICAL SURVEY.
Research at the Gulf Coast Hydroscience Center near Bay St. Louis, Mississippi, is being conducted in an indoor laboratory, and an outdoor laboratory. Much of the current indoor lab research is directed at improved methods of measuring flow. A towing tank and submerged jet tank are used for calibrating velocity meters. The outdoor laboratory consists of a flood-plain simulation facility. Much emph
Authors
Verne R. Schneider
Hydrothermal minerology of research drill hole Y-3, Yellowstone National Park, Wyoming
The approximate paragenetic sequence of hydrothermal minerals in the Y-3 U. S. Geological Survey research diamond-drill hole in Lower Geyser Basin, Yellowstone National Park, Wyoming, is: hydrothermal chalcedony, hematite, pyrite, quartz, clay minerals (smectite and mixed-layer illite-smectite), calcite, chlorite, fluorite, pyrite, quartz, zeolite minerals (analcime, dachiardite, laumontite, stilb
Authors
Keith E. Bargar, Melvin H. Beeson