Conference Papers
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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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DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.
A procedure has been developed using low temperature ashing, followed by size and sink-float separation of the ash, X-ray diffraction analysis, and instrumental neutron activation analysis to give both qualitative and quantitative information for major, minor and trace minerals and their associated trace elements in coal.
Authors
C.A. Palmer, R.H. Filby
DIGITAL CARTOGRAPHY AIDS IN THE SOLUTION OF BOUNDARY DISPUTE.
The boundary between the States of Ohio and Kentucky and Indiana and Kentucky has been in dispute for many years. A major breakthrough in this continuing dispute has been a recent agreement between the States to accept the boundary line as depicted on U. S. Geological Survey 7. 5-minute quadrangle maps. A new segment of the boundary line was established utilizing the shoreline depicted on the 1966
Authors
Francis J. Beck
DIGITAL GEOLOGIC MAP OF THE UNITED STATES.
The geologic map of the United States was published in 1974 by the U. S. Geological Survey. This major publication contains an enormous amount of information on the surficial geology of the United States. Many geologists have used this map as a research tool. Most have needed information from only specific parts of the map, and have manually extracted data from these areas. These data have then be
Authors
Patricia Fulton
Dunlins and merlins: predator avoidance in wintering shorebirds
No abstract available at this time
Authors
B.E. Kus
Eastern Devonian shales: Organic geochemical studies, past and present
The Eastern Devonian shales are represented by a sequence of sediments extending from New York state, south to the northern regions of Georgia and Alabama, and west into Ohio and to the Michigan and Ilinois Basins. Correlatives are known in Texas. The shale is regionally known by a number of names: Chattanooga, Dunkirk, Rhinestreet, Huron, Antrim, Ohio, Woodford, etc. These shales, other than thos
Authors
Irving A. Breger, Patrick G. Hatcher, L.A. Romankiw, F.P. Miknis
EFFICIENT TRANSFER OF DATA BETWEEN MAPS OF DIFFERENT PROJECTIONS.
There are several ways to transfer data from an existing map to another map by computer. If the projection and parameters of both maps are known, analytic formulas may be used to convert rectangular coordinates of the first map to latitude and longitude and then to rectangular coordinates of the second map. This general solution, contained in a USGS computer program, involves inverse formulas for
Authors
John P. Snyder
ESTIMATION OF RESPONSE-SPECTRAL VALUES AS FUNCTIONS OF MAGNITUDE, DISTANCE, AND SITE CONDITIONS.
Horizontal pseudo-velocity response was analyzed for twelve shallow earthquakes in western North America. Estimation of response-spectral values was related to magnitude, distance and site conditions. Errors in the methods are analyzed.
Authors
W. B. Joyner, D. M. Boore
Euler-Lagrangian computation for estuarine hydrodynamics
The transport of conservative and suspended matter in fluid flows is a phenomenon of Lagrangian nature because the process is usually convection dominant. Nearly all numerical investigations of such problems use an Eulerian formulation for the convenience that the computational grids are fixed in space and because the vast majority of field data are collected in an Eulerian reference frame. Severa
Authors
Ralph T. Cheng
EXPERIMENTS IN LITHOGRAPHY FROM REMOTE SENSOR IMAGERY.
Imagery from remote sensing systems such as the Landsat multispectral scanner and return beam vidicon, as well as synthetic aperture radar and conventional optical camera systems, contains information at resolutions far in excess of that which can be reproduced by the lithographic printing process. The data often require special handling to produce both standard and special map products. Some conc
Authors
R. H. Kidwell, J. McSweeney, A. Warren, E. Zang, E. Vickers
Feeding and predation: the significance of flocking in wintering shorebirds
No abstract available at this time
Authors
B.E. Kus
FINDINGS ON THE USE OF LANDSAT-3 RETURN BEAM VIDICON IMAGERY FOR DETECTING LAND USE AND LAND COVER CHANGES.
The spatial resolution of imagery from the return beam vidicon (RBV) camera aboard the Landsat-3 satellite suggested that such data might prove useful in inspecting land use and land cover maps. In this study, a 1972 land use and land cover map derived from aerial photographs is compared with a 1978 Landsat RBV image to delineate areas of change. Findings indicate RBV imagery useful in establishin
Authors
Valerie A. Milazzo
Fish cell lines: persistent infection with a coronavirus
No abstract available at this time
Authors
B. C. Lidgerding, F. Hetrick