Publications
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Map and table showing isotopic age data in Alaska Map and table showing isotopic age data in Alaska
The source of the data reported here is a compilation of radiometric ages maintained in conjunction with the Alaska Mineral Resource Assessment Program (AMRAP) studies for Alaska. The symbol shape plotted at each location is coded for rock type, whether igneous, metamorphic, or other; the color of the symbol shows the geologic era or period for the Sample(s) at each locale. A list of...
Authors
Frederic H. Wilson, Nora B. Shew, G.D. DuBois
Two-dimensional advective transport in nonlinear regression; sensitivities and uncertainty of plume-front observations Two-dimensional advective transport in nonlinear regression; sensitivities and uncertainty of plume-front observations
No abstract available.
Authors
E.R. Anderman, Mary C. Hill, E. P. Poeter
Use of surface-geophysical and borehole-radar methods to detect fractures in crystalline rocks, Mirror Lake area, Grafton County, New Hampshire Use of surface-geophysical and borehole-radar methods to detect fractures in crystalline rocks, Mirror Lake area, Grafton County, New Hampshire
No abstract available.
Authors
F.P. Haeni, John W. Lane, D.A. Lieblich
Effects of physical and chemical heterogeneity on water-quality samples obtained from wells Effects of physical and chemical heterogeneity on water-quality samples obtained from wells
Factors that affect the mass of chemical constituents entering a well include the distributions of flow rate and chemical concentrations along and near the screened or open section of the well. Assuming a layered porous medium (with each layer being characterized by a uniform hydraulic conductivity and chemical concentration), a knowledge of the flow from each layer along the screened...
Authors
Thomas E. Reilly, Jacob Gibs
Application of electromagnetic logging to contamination investigations in glacial sand-and-gravel aquifers Application of electromagnetic logging to contamination investigations in glacial sand-and-gravel aquifers
Electromagnetic (EM) logging provides an efficient method for high‐resolution, vertical delineation of electrically conductive contamination in glacial sand‐and‐gravel aquifers. LM. gamma, and lithologic logs and specific conductance data from sand‐and‐gravel aquifers at five sites in the northeastern United States were analyzed to define the relation of KM conductivity to aquifer...
Authors
John Williams, Wayne W. Lapham, Thomas H. Barringer
Use of geophysical data to assess scour development Use of geophysical data to assess scour development
The development of scour holes in the Connecticut River near the new Baldwin Bridge has been documented by comparing geophysical records collected before (1989), during (1990), and after (1992) bridge construction. Eight piers that support the 570-m (meter) span over the Connecticut River were protected by 12-m wide cofferdams during construction. The maximum flow during the study was...
Authors
Gary Placzek, Peter F. Haeni, Roy Trent
Use of ground-penetrating radar and continuous seismic-reflection profiling on surface-water bodies in environmental and engineering studies Use of ground-penetrating radar and continuous seismic-reflection profiling on surface-water bodies in environmental and engineering studies
No abstract available.
Authors
F.P. Haeni
Use of ground-penetrating radar to investigate refilled scour holes at bridge foundations Use of ground-penetrating radar to investigate refilled scour holes at bridge foundations
No abstract available.
Authors
F.P. Haeni, Gary Placzek, R.E. Trent
Geologic studies in Alaska by the U.S. Geological Survey, 1990 Geologic studies in Alaska by the U.S. Geological Survey, 1990
This collection of papers continues the annual series of U.S. Geological Survey (USGS) reports on geologic investigations in Alaska. From 1975 through 1988, the series was published as USGS circulars. The first of these appeared under the title "The United States Geological Survey in Alaska: Accomplishments during 1975," and the series continued to the last annual circular entitled...
Integrated use of surface-geophysical methods to indicate subsurface fractures at Tibbetts Road, Barrington, New Hampshire Integrated use of surface-geophysical methods to indicate subsurface fractures at Tibbetts Road, Barrington, New Hampshire
No abstract available.
Authors
D.A. Lieblich, F.P. Haeni, R.E. Cromwell
Integrated use of surface-geophysical methods to indicate subsurface fractures at Milford, New Hampshire Integrated use of surface-geophysical methods to indicate subsurface fractures at Milford, New Hampshire
No abstract available.
Authors
D.A. Lieblich, F.P. Haeni, J.W. Lane
Use of processed geophysical data to improve the delineation of infilled scour holes at bridge piers Use of processed geophysical data to improve the delineation of infilled scour holes at bridge piers
No abstract available.
Authors
F.P. Haeni, Gary Placzek