Analysis of seismograms from a downhole array in sediments near San Francisco Bay
William B. Joyner, Richard E. Warrick, Adolph A. Oliver III
1976, Open-File Report 76-296
A four-level downhole array of three-component instruments was established on the southwest shore of San Francisco Bay to monitor the effect of the sediments on low-amplitude seismic ground motion. The deepest instrument is at a depth of 186 meters, two meters below the top of the Franciscan bedrock. Earthquake data...
Preliminary investigations on computational methods for solving the two-point seismic ray-tracing problem in a heterogeneous and isotropic medium
J.P. Yang, William Hung Kan Lee
1976, Open-File Report 76-707
Two-point seismic ray tracing is an important problem in seismology. In this report, we study this problem by first deriving the differential equations governing seismic wave propagation between two end points in a 3-dimensional heterogeneous and isotropic medium. We then formulate three numerical schemes to solve the two-point ray-tracing problem....
Calibration of a mathematical model of the Antelope Valley ground-water basin, California
Timothy J. Durbin
1976, Open-File Report 76-833
Textural and mineralogical study of sandstones from the onshore Gulf of Alaska Tertiary Province, southern Alaska
Gary R. Winkler, Hugh McLean, George Plafker
1976, Open-File Report 76-198
Petrographic examination of 74 outcrop samples of Paleocene through Pliocene age from the onshore Gulf of Alaska Tertiary Province indicates that sandstones of the province characteristically are texturally immature and mineralogically unstable. Diagenetic alteration of framework grains throughout the stratigraphic sequence has produced widespread zeolite cement or phyllosilicate grain coatings...
Modeling coliform-bacteria concentrations and pH in the salt-wedge reach of the Duwamish River Estuary, King County, Washington
W.L. Haushild, Edmund A. Prych
1976, Open-File Report 76-415
Total- and fecal-coliform bacteria, plus pH, alkalinity, and dissolved inorganic carbon are water-quality parameters that have been added to an existing numerical model of water quality in the salt-wedge reach of the Duwamish River estuary in Washington. The coliform bacteria are modeled using a first-order decay (death) rate, which is...
Selection of streamflow and reservoir-release models for river-quality assessment
Marshall E. Jennings, James O. Shearman, Daniel P. Bauer
1976, Circular 715-E
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use...
An appraisal of ground water for irrigation in the Appleton area, west-central Minnesota
Steven P. Larson
1976, Water Supply Paper 2039-B
Supplemental irrigation of well-drained sandy soils has prompted an evaluation of ground water in the Appleton area. Glacial drift aquifers are the largest source of ground water. The surficial outwash sand and gravel is the most readily available and the most areally extensive drift aquifer, and it underlies much of...
Depositional environments of the Eagle Sandstone, north-central Montana-- an aid for hydrocarbon exploration (modified from a talk presented to the Rocky Mountain Section AAPG-SEPM Meeting, Billings, Montana, March 30, 1976)
Dudley D. Rice
1976, Open-File Report 76-423
Land and natural resource information and some potential environmental effects of surface mining of coal in the Gillette area, Wyoming
William Richard Keefer, R. F. Hadley
1976, Circular 743
Campbell County, along the east margin of the Powder River Basin in northeastern Wyoming, contains more coal than any other county in the United States. The principal deposit is the Wyodak-Anderson coal bed. The bed is 50-100 feet (15-30 meters) thick over large areas, lies less than 200 feet (60...
The evolution of the Landsat color composite; a slide-cassette training module
Ronald J. Peterson, William J. Redmond
1976, Open-File Report 76-390
No abstract available....
Interpretation of magnetic surveys in intermontane valleys of Nevada and southern New Mexico
G. D. Bath
1976, Open-File Report 76-440
An evaluation of the magnetic method of geophysical exploration in intermontane valleys is made through examples of magnetic properties, magnetic surveys, reduction of data, and analysis of magnetic anomalies from some valley areas. Measurements of magnetic properties of samples collected along valley margins or from drill holes indicate that the...
The effects of ground-water development on the water supply in the Post Headquarters area, White Sands Missile Range, New Mexico
T. E. Kelly, Glenn A. Hearne
1976, Open-File Report 76-277
Water-level declines in the Post Headquarters area, White Sands Missile Range, N. Mex., have been accompanied by slight but progressive increases in the concentration of dissolved solids in water withdrawn from the aquifer. Projected water-level declines through 1996 are estimated from a digital simulation model to not exceed 200 feet...
Tilt changes of short duration
Stuart McHugh
1976, Open-File Report 76-750
Section I of this report contains a classification scheme for short period tilt data. For convenience, all fluctuations in the local tilt field of less than 24 hours duration will be designated SP (i.e., short period) tilt events. Three basic categories of waveshape appearance are defined, and the rules for...
Hydrologic interpretation of geophysical data from the southeastern Hueco Bolson, El Paso, and Hudspeth Counties, Texas
Joseph Spencer Gates, W. D. Stanley
1976, Open-File Report 76-650
Airborne-electromagnetic and earth-resistivity surveys were used to explore for fresh ground water in the Hueco Bolson southeast of El Paso, Texas. Aerial surveys were made along about 500 miles (800 km) of flight line, and 67 resistivity soundings were made along 110 miles (180 km) of profile. The surveys did...
Simulation procedure for modeling transient water table and artesian stress and response
J.E. Reed, M. S. Bedinger, J. E. Terry
1976, Open-File Report 76-792
The series of computer programs described in this report were designed specifically to model the ground-water regime in sufficient detail to determine the effects of the imposition of various types of stress upon the system, and to display the results in a convenient manner during calibration and when presenting projected...
Guide to your first use of the Image 100, a slide-cassette training module
Dale G. Gehring
1976, Open-File Report 76-613
No abstract available....
CABFAC/USGS, a FORTRAN program for Q-mode factor analysis of stratigraphically ordered samples
David P. Adams
1976, Open-File Report 76-216
This program is a revision of the CABFAC program of Kovan and Imbrie (1971) which incorporates the following improvements: each factor is plotted against depth on the printer; samples are ordered stratigraphically by the program, so that input data need not be ordered stratigraphically; an option has been added to...
Distribution of seed plants with respect to tide levels and water salinity in the natural tidal marshes of the northern San Francisco Bay Estuary, California
Brian F. Atwater, Charles W. Hedel
1976, Open-File Report 76-389
Shoaling of subtidal and intertidal mud flats has permitted tidal marshes to spread across large marginal areas of the San Francisco Bay estuary during the past several thousand years. By 1850 A.D. the tidal marshes of the estuary, including those of the Sacramento - San Joaquin Delta, covered an area...
A probabilistic estimate of maximum acceleration in rock in the contiguous United States
Sylvester Theodore Algermissen, David M. Perkins
1976, Open-File Report 76-416
This paper presents a probabilistic estimate of the maximum ground acceleration to be expected from earthquakes occurring in the contiguous United States. It is based primarily upon the historic seismic record which ranges from very incomplete before 1930 to moderately complete after 1960. Geologic data, primarily distribution of faults, have...
Lead isotope data bank; 2,624 samples and analyses cited
Bruce R. Doe
1976, Open-File Report 76-201
The Lead Isotope Data Bank (LIDB) was initiated to facilitate plotting data. Therefore, the Bank reflects data most often used in plotting rather than comprises a comprehensive tabulation of lead isotope data. Up until now, plotting was done using card decks processed by computer with tapes plotted by a Gerber...
Reconnaissance of the water resources of the upper Klickitat River Basin, Yakima Indian Reservation, Washington
Denzel R. Cline
1976, Open-File Report 75-518
Large quantities of ground water and surface water are available in Washington County. Major sources of ground water are the Gosport Sand and Lisbon Formation undifferentiated, the Miocene Series undifferentiated, and alluvium and low terrace deposits. The Miocene, the most productive source of ground water, will yield 0.5 to 1.0...
Reservoir-system model for the Willamette River basin, Oregon
James O. Shearman
1976, Circular 715-H
For nearly half a century the Willamette River in Oregon experienced severe dissolved-oxygen problems related to large loads of organically rich waste waters from industries and municipalities. Since the mid-1950 's dissolved oxygen quality has gradually improved owing to low-flow augmentation, the achievement of basinwide secondary treatment, and the use...
Data for calibrating unsteady-flow sediment-transport models, East Fork River, Wyoming, 1975
Holly A. Mahoney, Edmund D. Andrews, William W. Emmett, Luna Bergere Leopold, Robert H. Meade, Robert M. Myrick, Carl F. Nordin
1976, Open-File Report 76-22
In 1975, data to calibrate a one-dimensional unsteady-flow and sediment-transport routing model were collected on a reach of the East Fork River of western Wyoming. The reach, 3.1 miles (5 kilometers) in length, wan immediately upstream from a previously established bedload sampling station. Nineteen channel cross sections were sounded at...
Evaluation of hydrologic properties of the Long Island ground-water reservoir using cross-sectional electric-analog models
O.L. Franke, R.T. Getzen
1976, Open-File Report 75-679
Variables necessary for constructing a quantitative model to predict the response of ground-water reservoirs to hydrologic stresses are in four classes: (a) external and internal geometry of the reservoir, (b) nature of the reservoir boundaries, (c) areal distribution of horizontal and vertical hydraulic conductivities, and (d) areal distribution of storage...
Documentation of programs that compute 1) static tilts for a spatially variable slip distribution, and 2) quasi-static tilts produced by an expanding dislocation loop with a spatially variable slip distribution
Stuart McHugh
1976, Open-File Report 76-578
The material in this report is concerned with the effects of a vertically oriented rectangular dislocation loop on the tilts observed at the free surface of an elastic half-space. Part I examines the effect of a spatially variable static strike-slip distribution across the slip surface. The tilt components as a...
