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.
Filter Total Items: 5326
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
INTERPRETATION OF THERMAL-INFRARED MULTISPECTRAL SCANNER IMAGES OF THE OSGOOD MOUNTAINS, NEVADA.
Data from the Thermal-Infrared Multispectral Scanner (TIMS) were collected over the Osgood Mountains in northern Nevada midmorning on 27 August 1983. The area includes gold-producing properties of the Getchell Mine, the Prinson Mine, and a prospect being developed near Preble, Nevada. Tungsten-bearing tactite deposits, barite deposits, and some minor lead-zinc deposits are also present. The area w
Authors
M. Dennis Krohn
JOINT DEVELOPMENT OF A NATIONAL 1:100,000-SCALE DIGITAL CARTOGRAPHIC DATA BASE.
The U. S. Geological Survey is beginning a major new program to create a nationwide digital cartographic data base from 1:100,000-scale maps by the end of the decade. This data base will supplement the currently available 1:2,000,000-scale national data base and the selected coverage at 1:24,000-scale. It is anticipated that the data will be useful for both the production of custom graphics and as
Authors
George M. Callahan, Frederick R. Broome
KONOCTI BAY FAULT ZONE, LAKE COUNTY, CALIFORNIA: A REEVALUATION.
The Konocti Bay Fault Zone (KBFZ), initially regarded by some as a promising liquid-dominated hydrothermal system, has been a disappointment as a geothermal prospect. Five exploratory wells have been drilled in the vicinity of the KBFZ, but none of them are producing thermal fluids; in fact, three have been abandoned. This may be because hydrothermal fluid discharges along the KBFZ are low. The Na
Authors
J. Michael Thompson
LANDSAT M. S. S. IMAGE MOSAIC OF TUNISIA.
The Landsat mosaic of Tunisia funded by USAID for the Remote Sensing Laboratory, Soils Division, Ministry of Agriculture, Tunisia, was completed by the USGS in September 1983. It is a mixed mosaic associating digital corrections and enhancements to manual mosaicking and corresponding to the Tunisian request for high resolution and the limited available funds. The scenes were processed by the Envir
Authors
J. C. Boswell-Thomas
LINEAR MODELS FOR MANAGING SOURCES OF GROUNDWATER POLLUTION.
Mathematical models for the problem of maintaining a specified groundwater quality while permitting solute waste disposal at various facilities distributed over space are discussed. The pollutants are assumed to be chemically inert and their concentrations in the groundwater are governed by linear equations for advection and diffusion. The aim is to determine a disposal policy which maximises the
Authors
Steven M. Gorelick, Sven-Ake Gustafson
Long-term observations of bottom conditions and sediment movement on the Atlantic continental shelf; time-lapse photography from instrumented tripod
An instrument system that measures bottom current, temperature, light transmission, and pressure, and that photographs the bottom at 2- to 6-hour intervals has been developed to study sediment transport on the Atlantic Continental Shelf. Instruments have been deployed extensively along the United States East Coast Continental Shelf for periods of from 2 to 6 months to study the frequency, directio
Authors
Bradford Butman, Cynthia G. Bryden, Stephanie L. Pfirman, William J. Strahle, Marlene A. Noble
MAJOR SOURCE OF NEW RADAR DATA FOR EXPLORATION RESEARCH.
In 1980, the U. S. Geological Survey (USGS) initiated a program to acquire high-quality, side-looking, airborne-radar (SLAR) imagery of selected areas of the United States. The program goals were to demonstrate the usefulness of SLAR imagery for geologic exploration and geoscience applications and to make radar data readily available to the public for additional research and economic applications.
Authors
Allan N. Kover, John Edwin Jones, C. Scott Southworth