Rectangular harmonic analysis applied to the geomagnetic field
L.R. Alldredge
1981, Journal of Geophysical Research B: Solid Earth (86) 3021-3026
Spherical harmonic analysis of the earth's magnetic field is limited in the resolution that can be obtained. This limitation is caused by inadequacies of computers and of available data sets. The fundamental wavelength in spherical harmonic analysis is the circumference of the earth. To resolve wavelengths as short as 100...
Water content in Palo Duro salt, Randall and Swisher County cores
R.L. Bassett, E. Roedder
1981, Report, Geology and geohydrology of the Palo Duro Basin, Texas Panhandle: A report on the progress of nuclear waste isolation feasibility studies
No abstract available...
Organochlorine residues in fish: National Pesticide Monitoring Program, 1970-74
Christopher J. Schmitt, J. Larry Ludke, D. F. Walsh
1981, Pesticides Monitoring Journal (14) 136-206
As part of the National Pesticide Monitoring Program, the U.S. Fish and Wildlife Service analyzed organochlorine contaminant residues in fish samples collected from about 100 stations each year from 1970 to 1974. During this period, mean residues of DDT and its metabolites declined nationally but remained widespread, and high concentrations...
Geologic transect of the northern Diablo Range, California
M. Clark Blake Jr.
1981, Conference Paper, Upper Mesozoic Franciscan Rocks and Great Valley Sequence, Central Coast Ranges, California: Field Trip Guide V
No abstract available....
Seismic zonation in the San Francisco Bay region
E. E. Brabb
1981, Conference Paper, Proceedings: Social and economic impact of earthquakes on utility lifelines: Seismic considerations in lifelines planning, siting and design: Construction Division specialty conference
No abstract available....
An iridium abundance anomaly at the palynological Cretaceous-Tertiary boundary in northern New Mexico
C. J. Orth, J. S. Gilmore, J.D. Knight, C. L. Pillmore, R.H. Tschudy, J.E. Fassett
1981, Science (214) 1341-1343
An iridium abundance anomaly, with concentrations up to 5000 parts per trillion over a background level of 4 to 20 parts per trillion, has been located in sedimentary rocks laid down under freshwater swamp conditions in the Raton Basin of northeastern New Mexico. The anomaly occurs at the base of...
Geodetic measurement of crustal deformation on the San Andreas, Hayward, and Calaveras faults near San Francisco, California
W.H. Prescott, Michael Lisowski, James C. Savage
1981, Journal of Geophysical Research B: Solid Earth (86) 10853-10869
Analysis of a geodetic network of 115 lines crossing the San Andreas, Hayward, and Calaveras faults in the vicinity of San Francisco Bay and measured repeatedly between 1970 and 1980 has revealed details about the accommodation of relative plate motion in this area. The most striking result is that the...
Characteristics of mineral deposit occurrences: guide book for use as an aid in mineral resource studies
Ralph Leroy Erickson
1981, Report
No abstract available....
Effects of malathion, diazinon, and parathion on mallard embryo development and cholinesterase activity
David J. Hoffman, W. C. Eastin Jr.
1981, Environmental Research (26) 472-485
The effects of external exposure of mallard (Anas platyrhynchos) eggs to malathion, diazinon, and parathion were examined using formulations and concentrations similar to field applications. Treatment with aqueous emulsion simulated exposure at the rate of 100 gal per acre (153 liters/hectare) with three to six different doses per compound with...
Patterns of groundwater salinity changes in a deep continental-oceanic transect off the southeastern Atlantic coast of the U.S.A.
F.T. Manheim, C. K. Paull
1981, Journal of Hydrology (54) 95-105
Investigations of formation-fluid salinities in a transect from western Georgia to the edge of the Blake Plateau off the coast of Georgia show surprisingly similar hydrochemical features offshore and onshore. A fresh-brackish wedge of groundwater (<25 g/kg total dissolved solids) lies beneath the shelf to a depth of ∼ 900...
Stability of a very coarse-grained beach at Carmel, California
John R. Dingler
1981, Marine Geology (44) 241-252
Monastery Beach at Carmel, California, is a pocket beach composed of very coarse to granular sediment. In profile, the beach has a well-defined berm crest; a steep foreshore; and a gently sloping, barless offshore covered by large, long-crested oscillation ripples. Carmel Submarine Canyon heads a few hundred meters offshore of...
Geological considerations in hazardous waste disposal
K. Cartwright, R. H. Gilkeson, T.M. Johnson
1981, Journal of Hydrology (54) 357-369
Present regulations assume that long-term isolation of hazardous wastes - including toxic chemical, biological, radioactive, flammable and explosive wastes - may be effected by disposal in landfills that have liners of very low hydraulic conductivity. In reality, total isolation of wastes in humid areas is not possible; some migration of...
Post-fire succession of the herbaceous flora in southern California chaparral
Sterling C. Keeley, Jon E. Keeley, S. M. Hutchinson, A. W. Johnson
1981, Ecology (62) 1608-1621
Postfire succesion of the temporary herbaceous and suffrutescent cover was studied after chaparral fires in San Diego County, California, USA. Four categories of species make up the temporary cover. (1) "Generalized herbaceous perennials" are present before and after fire. Populations of these herbs are sparse under the shrub canopy. They...
Image enhancement through film recorder response contouring
John E. Boyd
1981, Conference Paper, Proceedings Volume 0278, Electro-Optical Instrumentation for Resources Evaluation
In contrast to the traditional recording from high-altitude aircraft of Earth images directly onto film in their inherently continuous analog form, a Landsat Earth resources satellite samples the ground image brightness and records it on a digital, electronic medium. Although digitization incurs several extra steps in the reproduction of the...
Estimation of the geochemical threshold and its statistical significance
A.T. Miesch
1981, Journal of Geochemical Exploration (16) 49-76
A statistic is proposed for estimating the geochemical threshold and its statistical significance, or it may be used to identify a group of extreme values that can be tested for significance by other means. The statistic is the maximum gap between adjacent values in an ordered array after each gap...
Effects of petroleum on adrenocortical activity and on hepatic naphthalene-metabolizing activity in mallard ducks
J. Gorsline, W. N. Holmes
1981, Archives of Environmental Contamination and Toxicology (10) 765-777
Unstressed mallard ducks (Anas platyrhychos), given uncontaminated food and maintained on a short photoperiod, show two daily maxima in plasma corticosterone concentration ([B]); one occurring early in the light phase and a second just before the onset of darkness. After one week of exposure to food containing 3% (v/w) South...
Effects of dietary nickel on survival and growth of mallard ducklings
B. W. Cain, E. A. Pafford
1981, Archives of Environmental Contamination and Toxicology (10) 737-745
Mallard (Anas platyrhynchos) ducklings were fed nickel sulphate in their diet from day one to 90 days of age. Ducklings fed 1,200 ppm nickel began to tremor and show signs of paresis after 14 days of dosage (age) and 71% of this group died within 60 days of age. Birds...
Subsurface injection of liquid waste in Florida, United States of America
John Vecchioli
1981, Science of Total Environment (21) 127-136
In 1979, liquid waste was injected into the subsurface of Florida by 10 injection systems at an aggregate average rate of 165,000 m3/d. All the systems inject into carbonate rocks that contain salty water. Extensive precautions are taken in the construction of the injection wells and in the monitoring of...
Role of numerical simulation in analysis of ground-water quality problems
Leonard F. Konikow
1981, Science of the Total Environment (21) 299-312
The increasing public awareness and concern about the hazards of toxic chemicals contaminating aquifers has created an increased need for predictive capabilities to analyze ground-water contamination problems. Several digital models to simulate the movement and concentration of ground-water contaminants have been documented recently. Most simulate the transport and dispersion of...
The role of change data in a land use and land cover map updating program
Valerie A. Milazzo
1981, Pecora VII Symposium 189-200
An assessment of current land use and a process for identifying and measuring change are needed to evaluate trends and problems associated with the use of our Nation's land resources. The U. S. Geological Survey is designing a program to maintain the currency of its land use and land...
Digital elevation data as an aid to land use and land cover classification
Alden P. Colvocoresses
1981, Pecora VII Symposium 92-93
Elevation data is generally associated with topographic maps and expressed by contours and spot elevations. However, elevation data is also essential to the proper classification of land use and land cover by remote sensing techniques. Absolute elevation governs various types of vegetative growth as does the degree and direction of...
Classification systems for natural resource management
Richard L. Kleckner
1981, Pecora VII Symposium 65-70
Resource managers employ various types of resource classification systems in their management activities such as inventory, mapping, and data analysis. Classification is the ordering or arranging of objects into groups or sets on the basis of their relationships, and as such, provide the resource managers with a structure for...
Some thoughts on cartographic and geographic information systems for the 1980's
L.E. Starr, Kirk E. Anderson
1981, Pecora VII Symposium 41-55
The U.S. Geological Survey is adopting computer techniques to meet the expanding need for cartographic base category data. Digital methods are becoming increasingly important in the mapmaking process, and the demand is growing for physical, social, and economic data. Recognizing these emerging needs, the National Mapping Division began,...
A comparative study of linear and nonlinear edge finding techniques for Landsat multispectral data
Robert Shaw, Lynda Sowers, Ellen Sanchez
1981, Pecora VII Symposium 529-542
Several numerical methods were computerize in order to evaluate edge finding techniques for accuracy, versatility and computer time and cost. The study was preformed primarily to select edge detection operators which will be used to do spatial correlation between images for image registration of Landsat Multispectral Scanner (MSS) scenes....
The role of remotely sensed and other spatial data for predictive modeling: the Umatilla, Oregon example
Thomas R. Loveland, Gary E. Johnson
1981, Pecora VII Symposium 442-454
The U. S. Geological Survey's Earth Resources Observations Systems Data Center, in cooperation with the U.S. Army Corps of Engineers, Portland District, developed and tested techniques that used remotely sensed and other spatial data in predictive models to evaluate irrigation agriculture in the Umatilla River Basin of north-central Oregon....
