LIQUEFACTION POTENTIAL OF SEDIMENT IN THE NORTHERN BERING SEA.
William J. Winters
Chaney Ronald C.Demars Kenneth R., editor(s)
1985, Conference Paper, ASTM Special Technical Publication
The liquefaction potential of sediment in Norton Sound and the northern Bering Sea was evaluated by estimating the liquefaction susceptibility of the material from in-situ and laboratory tests in terms of earthquake and wave loads required to liquefy the material, and then comparing estimated behavior with anticipated loadings caused by...
New approach to calibrating bed load samplers
D. W. Hubbell, H.H. Stevens, J. V. Skinner, J.P. Beverage
1985, Journal of Hydraulic Engineering (111) 677-694
Cyclic variations in bed load discharge at a point, which are an inherent part of the process of bed load movement, complicate calibration of bed load samplers and preclude the use of average rates to define sampling efficiencies. Calibration curves, rather than efficiencies, are derived by two independent methods using...
The need for accuracy in modelling: An example
Douglas H. Johnson, Michael J. Conroy, James D. Nichols
1985, Ecological Modelling (30) 157-161
The need for accurate information in modelling depends on the objectives of the effort, but trustworthy data are essential for a model intended for use in the management of natural resources. This point is illustrated by referring to a recently published model of canvasback ducks. We demonstrate that several key...
The Steens Mountain (Oregon) geomagnetic polarity transition: 1. Directional history, duration of episodes, and rock magnetism
Edward A. Mankinen, M. Prevot, C. Sherman Gromme, Robert S. Coe
1985, Journal of Geophysical Research B: Solid Earth (90) 10393-10416
The thick sequence of Miocene lava flows exposed on Steens Mountain in southeastern Oregon is well known for containing a detailed record of a reversed‐to‐normal geomagnetic polarity transition. Paleomagnetic samples were obtained from the sequence for a combined study of the directional and intensity variations recorded; the paleointensity study is...
Block Island fault: A Paleozoic crustal boundary on the Long Island platform
Deborah R. Hutchinson, Kim D. Klitgord, R. S. Detrick
1985, Geology (13) 875-879
A major fault cutting through most of the crust can be identified and mapped on the Long Island platform using multichannel seismic reflection profiles and magnetic data. The fault, here called the Block Island fault (BIF), strikes north-northeast, dips westward at low angle, and does not resemble the thin-skinned thrust...
Intraband radiometric performance of the Landsat Thematic Mappers.
H. H. Kieffer, D.A. Cook, E. M. Eliason, P.T. Eliason
1985, Photogrammetric Engineering and Remote Sensing (51) 1331-1350
Radiometric characteristics have been examined of the Landsat-4 and Landsat-5 Thematic Mappers (TMs) that can be established without absolute calibration of spectral data. This analysis is based on radiometrically and geometrically raw (B-type) data of both uniform (flat-field) and high-contrast scenes. Subscenes selected for uniform radiance were used to characterized...
Selected characteristics of limestone and dolomite reservoirs in the United States
James W. Schmoker, Katherine B. Krystinik, Robert B. Halley
1985, American Association of Petroleum Geologists Bulletin (69) 733-741
Data from the United States Oil and Gas File (TOTL) developed by the University of Oklahoma, Norman, Oklahoma, are used to characterize the lithology, location (state and basin), geologic age, year of discovery, depth to top of pay, porosity, permeability, water saturation, volume of crude oil and nonassociated gas originally...
The copper-nickel concentration log: A tool for stratigraphic interpretation within the ultramafic and basal zones of the stillwater complex, Montana
L.J. Drew, W.J. Bawiec, N.J. Page, J.H. Schuenemeyer
1985, Journal of Geochemical Exploration (23) 117-137
An analogue to the electric well log was devised for copper-nickel concentration drill-hole data from the Basal and lower part of the Ultramafic zones of the Stillwater Complex using automated data processing. The copper-nickel concentration logs graphically represent intensity (concentration) values that reflect the distribution of the elements in sulfide...
Adjustment of geochemical background by robust multivariate statistics
D. Zhou
1985, Journal of Geochemical Exploration (24) 207-222
Conventional analyses of exploration geochemical data assume that the background is a constant or slowly changing value, equivalent to a plane or a smoothly curved surface. However, it is better to regard the geochemical background as a rugged surface, varying with changes in geology and environment. This rugged surface can...
Benthic fluxes in San Francisco Bay
Douglas E. Hammond, C. Fuller, D. Harmon, Blayne Hartman, M. Korosec, L.G. Miller, R. Rea, S. Warren, W. Berelson, S.W. Hager
1985, Hydrobiologia (129) 69-90
Measurements of benthic fluxes have been made on four occasions between February 1980 and February 1981 at a channel station and a shoal station in South San Francisco Bay, using in situ flux chambers. On each occasion replicate measurements of easily measured substances such as radon, oxygen, ammonia, and silica...
Temporal fluctuations in grain size, organic materials and iron concentrations in intertidal surface sediment of San Francisco Bay
E. A. Thomson-Becker, Samuel N. Luoma
1985, Hydrobiologia (129) 91-107
The physical and chemical characteristics of the oxidized surface sediment in an estuary fluctuate temporally in response to physical forces and apparently-fluctuating inputs. These characteristics, which include grain size and concentrations of organic materials and iron, will influence both trace-metal geochemistry and bioavailability. Temporal trends in the abundance of fine...
Digital to Analog Conversion and Visual Evaluation of Thematic Mapper Data
James R. McCord, Douglas R. Binnie, Paul M. Seevers
1985, Journal of Imaging Technology (11) 125-130
As a part of the National Aeronautics and Space Administration Landsat D Image Data Quality Analysis Program, the Earth Resources Observation Systems Data Center (EDC) developed procedures to optimize the visual information content of Thematic Mapper data and evaluate the resulting photographic products by visual interpretation. A digital-to-analog transfer function...
Experimental chemical weathering of various bedrock types at different pH-values. 1. Sandstone and granite
A.A. Afifi, O.P. Bricker, J.C. Chemerys
1985, Chemical Geology (49) 87-113
Experimental chemical weathering of the so-called Old Rag Granite and Massanutten Sandstone, Virginia, U.S.A., has produced a comparison with the natural environment, and prediction of the effect of acid precipitation. The experimental results of the release of elements, dissolution of minerals, total rock weathered and the degree of weathering...
Determination of elastic wave velocity and relative hypocenter locations using refracted waves. I. Methodology
Kaye M. Shedlock, Lucile M. Jones, Xiufang Ma
1985, Bulletin of the Seismological Society of America (75) 427-439
An arrival time difference method utilizing refracted arrivals from earthquakes in a homogeneous, layered earth model has been developed for the simultaneous determination of near-source (in situ) velocity and relative locations of earthquakes. The method is particularly applicable when analyzing data from arrays in which most of the recording stations...
Lognormal field size distributions as a consequence of economic truncation
E. D. Attanasi, L.J. Drew
1985, Journal of the International Association for Mathematical Geology (17) 335-351
The assumption of lognormal (parent) field size distributions has for a long time been applied to resource appraisal and evaluation of exploration strategy by the petroleum industry. However, frequency distributions estimated with observed data and used to justify this hypotheses are conditional. Examination of various observed field size distributions across...
DATA ACQUISITION AND APPLICATIONS OF SIDE-LOOKING AIRBORNE RADAR IN THE U. S. GEOLOGICAL SURVEY.
John Edwin Jones, Allan N. Kover
1985, Conference Paper, Technical Papers of the American Society of Photogrammetry, Annual Meeting
The Side-Looking Airborne Radar (SLAR) program encompasses a multi-discipline effort involving geologists, hydrologists, engineers, geographers, and cartographers of the U. S. Geological Survey (USGS). Since the program began in 1980, more than 520,000 square miles of aerial coverage of SLAR data in the conterminous United States and Alaska have been...
Improving waterfowl production estimates: Results of a test in the prairie pothole region
P.M. Arnold, L.M. Cowardin
1985, International Congress of Game Biologists (17) 859-865
The U.S. Fish and Wildlife Service in an effort to improve and standardize methods for estimating waterfowl production tested a new technique in the four-county Arrowwood Wetland Management District (WMD) for three years (1982-1984). On 14 randomly selected 10.36 km2 plots, upland and wetland habitat was mapped, classified, and digitized....
Use of strontium isotopes to constrain the timing and mode of dolomitization of upper Cenozoic sediments in a core from San Salvador, Bahamas
Peter K. Swart, Joaquin Ruiz, Charles W. Holmes
1985, Geology (15) 262-265
The 87Sr/86Sr ratios and the activity ratios of 234U/238U and 230Th/238U have been measured in dolomites from a 168-m-deep core taken on the island of San Salvador, Bahamas. These data suggest two periods of dolomitization. The first episode dolomitized Miocene age sediments during the latest Miocene, and the second dolomitized the Pliocene portion...
Digital to analog conversion and visual evaluation of Thematic Mapper data
James R. McCord, Douglas R. Binnie, Paul M. Seevers
1985, Journal of Imaging Technology (11) 125-130
As a part of the National Aeronautics and Space Administration Landsat D Image Data Quality Analysis Program, the Earth Resources Observation Systems Data Center (EDC) developed procedures to optimize the visual information content of Thematic Mapper data and evaluate the resulting photographic products by visual interpretation. A digital-to-analog transfer function...
Processing of Landsat imagery to map surface mineral alteration on the Alaska Peninsula: A section in USGS research on mineral resources, 1985 program and abstracts
Frederic H. Wilson, James York
1985, Circular 949
Landsat images were digitally processed to facilitate assessment of the mineral resources of the Port Moller, Stepovak Bay, and Simeonof Island 1:250,000 quadrangles. Field mapping and assessment of these quadrangles were begun in 1983 as part of the Alaska Mineral Resource Assessment Program (AMRAP). It was quickly realized that time...
Water resources data for Maryland and Delaware, water year 1983
R.W. James, R.H. Simmons, B.F. Strain
1984, Water Data Report MD-DE-83-1
No abstract available. ...
Developing a state water plan: Ground-water conditions in Utah, spring of 1984
Charles Avery, L. R. Herbert, Donald A. Bischoff, David W. Clark, Ralph L. Seiler, Kevin Guttormson, Melanie S. Elizondo, V.L. Jensen, Michael Enright, D. C. Emett, Carole B. Burden, M.R. Eckenwiler, G. W. Sandberg
1984, Cooperative Investigations Report 24
This is the twenty-first in a series of annual reports that describe ground-water conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties to keep abreast of changing ground-water conditions.This report, like the...
Chemical determination of particulate nitrogen in San Francisco Bay. Nitrogen: chlorophyll a rations in plankton
S.W. Hager, D.D. Harmon, A.E. Alpine
1984, Estuarine, Coastal and Shelf Science (19) 193-204
Particulate nitrogen (PN) and chlorophyll a (Chla) were measured in the northern reach of San Francisco Bay throughout 1980. The PN values were calculated as the differences between unfiltered and filtered (0·4 μm) samples analyzed using the UV-catalyzed peroxide digestion method. The Chla values were measured spectrophotometrically, with corrections made for phaeopigments. The...
Evaluation of the ground-water resources of coastal Georgia: preliminary report of the data available as of July 1983
Richard E. Krause
1984, Georgia Geologic Survey Information Circular 62
A compilation of ground-water data that have been collected for nearly 100 years in the coastal area of Georgia is presented in this report. The compilation of pertinent data indicates what information is available for use in the evaluation of the ground-water resources of the 13 counties of coastal Georgia....
Defining geologic Hazards for natural resources management using tree-ring analysis
J.V. DeGraff, S.S. Agard
1984, Environmental Geology and Water Sciences (6) 147-155
Landslides, avalanches, floods, and other geologic hazards impair natural resources management by jeopardizing public safety, damaging or restricting resource utilization, and necessitating expenditures for corrective measures The negative impact of geologic hazard events can be reduced by tailoring resources management to hazard potential of an area This requires assessment of...
