Digital model of the unconsolidated aquifer system in the Modesto area, Stanislaus and San Joaquin Counties, California
Clark J. Londquist
1981, Water-Resources Investigations Report 81-12
A digital mathematical model of the unconsolidated alluvial aquifer system in the Modesto area, Calif., has been developed which can be used to determine the effects of increased pumping and water use of future water levels in the aquifer system. The model is divided into two units. The lower unit...
Effects of irrigation pumping on the ground-water system in Newton and Jasper Counties, Indiana
Marcel P. Bergeron
1981, Water-Resources Investigations Report 81-38
Flow in the ground-water system in Newton and Jasper Counties, Indiana, was simulated in a quasi-three-dimensional model in a study of irrigation use of ground water in the two counties. The ground-water system consists of three aquifers: (1) a surficial coarse sand aquifer known as the Kankakee aquifer, (2) a...
Seismic-reflection and sidescan-sonar data collected on the Potomac River, Maryland and Virginia, during May 1979
Harley J. Knebel
1981, Open-File Report 81-174
The U.S. Geological Survey collected 2,170 line kilometers of single-channel seismic-reflection profiles and sidescan sonar records on the Potomac River during R/V NEECHO cruise NE-3-79 in May 1979. The purposes of the survey were to define: (1) areas of sediment accumulation and erosion; (2) the thickness of Holocene sediments; (3)...
Earthquake and seismicity research using SCARLET and CEDAR
J. Bernard Minster, Karen McNally
1981, Open-File Report 81-286
During the second period of Contract #14-08-0001-1833 (Earthquake and Seismicity Research using SCARLET and CEDAR), we continued and completed research in three main areas: 1) Multimode analysis of Rayleigh type Lg in Southern California. This research is currently being complemented by a similar study in Central California along the West...
Research on uranium resource models, a progress report: Part IV, LOGIC, a computer graphics program to construct integrated logic circuits for genetic-geologic models
William A. Scott, Raymond Marriner Turner, Richard B. McCammon
1981, Open-File Report 81-556
Map showing aeromagnetic interpretation of the Baker-Cypress BLM Instant Study Area and Timbered Crater Forest Service Further Planning Areas, Modoc, Shasta, and Siskiyou counties, California
Andrew Griscom
1981, Miscellaneous Field Studies Map 1214-C
The data for the aeromagnetic map of the Baker-Cypress and Timbered crater areas were collected in 1978 and compiled at a scale of 1 :62,500 (U,S, Geological Survey, 1979). East-west traverses were spaced at 0.8-km intervals at a constant altitude of 1370 m (4500 ft) above sea level, Contour interval...
Petrogenetic modeling of a potential uranium source rock, Granite Mountains, Wyoming
J. S. Stuckless, A.T. Miesch
1981, Professional Paper 1225
Previous studies of the granite of Lankin Dome have led to the conclusion that this granite was a source for the sandstone-type uranium deposits in the basins that surround the Granite Mountains, Wyo. Q-mode factor analysis of 29 samples of this granite shows that five bulk compositions are required to...
A model of uranium mineralization in the Dripping Spring Quartzite, Gila County, Arizona
Connie J. Nutt
1981, Open-File Report 81-524
A crustal deformation observatory near the San Andreas Fault in central California (PB3)
Larry E. Slater
1981, Open-File Report 81-940
This final technical report discusses several objectives and accomplishments of the first years effort of a project titled A Crustal Deformation Observatory Near the San Andreas Fault in Central California. This period saw the conclusion of the Hollister MWDM effort that has produced nearly continuous, high precision, line length measurements...
A finite-element model study of the impact of the proposed I-326 crossing on flood stages of the Congaree River near Columbia, South Carolina
J. K. Lee, C. S. Bennett III
1981, Open-File Report 81-1194
A two-dimensional finite element surface water model was used to study the hydraulic impact of the proposed Interstate Route 326 crossing of the Congaree River near Columbia, SC. The finite element model was assessed as a potential operational tool for analyzing complex highway crossings and other modifications of river flood...
Flow routing in the Susquehanna River Basin: Part IV - Routing reservoir releases in the eastern Susqehanna river basin in New York State
Thomas J. Zembrzuski Jr.
1981, Water-Resources Investigations Report 80-117
Flow-routing models for six reaches of major streams in the eastern Susquehanna River basin in New York were developed and used to trace releases of water from East Sidney Lake and Whitney Point Lake to gaged points downstream. Daily streamflow during 1942-77 was modeled for the following reaches: Susquehanna River--Unadilla...
Pattern-recognition program modified and applied to southeastern United States seismicity
Meridee Jones-Cecil, Russell L. Wheeler, James W. Dewey
1981, Open-File Report 81-195
The pattern-recognition technique of Bongard and others (1966), Gelfand and others (1976), and Briggs and others (1977) was modified and applied in Southeastern United States to try to detect combinations or interactions of geologic, geophysical, and topographic parameters characteristic of areas with moderate and large earthquakes. The modification involved replacing...
Modeling the cumulative onshore effects of offshore oil and gas development
E.T. Smith, L.G. Hecht
1981, Open-File Report 81-317
Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980
Miles L. Silberman, C. W. Field, Anne L. Berry
1981, Open-File Report 81-355
Stratiform and volcanogenic zinc-lead-barium deposits occur within the pelagic Kagvik sequence in the Red Dog Creek and Drenchwater Creek areas in the DeLong Mountains and Howard Pass quadrangles. The sulfide deposits occur together with barite, tuff, sandstone, shale, chert, and keratophyre flows and sills. The three main occurrences of the...
Hydrogeologic conditions in the coastal plain of New Jersey
Eric F. Vowinkel, W. Kendall Foster
1981, Open-File Report 81-405
A wedge-shaped mass of unconsolidated sediments composed of alternating layers of clay, silt, sand, and gravel underlies the Coastal Plain of New Jersey. The hydrologic units of this mass vary in thickness, lateral extent, lithology, and water-bearing characteristics. Some of the units act as aquifers, whereas other units act as...
Bed form distribution and inferred sand transport on Georges Bank
David C. Twichell
1981, Open-File Report 81-764
Four bed-form provinces have been identified on Georges Bank using sidescan sonar and echo-sounding techniques: large sand waves, small sand waves, megaripples, and featureless sea floor. The large sand waves are found on the bank crest where the surface tidal currents are strongest, and are bordered, north and south, by...
An oilspill risk analysis for the Beaufort Sea, Alaska (proposed sale 71)outer continental shelf lease area
W.B. Samuels, Dorothy Hopkins, K.J. Lanfear
1981, Open-File Report 82-13
An oilspill risk analysis was conducted to determine the relative environmental hazards of developing oil in different regions of the Beaufort Sea, Alaska, (Proposed Sale 71) Outer Continental Shelf (OCS) lease area. The probability of spill occurrences, likely movement of oil slicks, and locations of resources vulnerable to spilled oil...
Documentation and user's guide to the USGS oilspill risk analysis model: oilspill trajectories and calculation of conditional probabilities
Kenneth J. Lanfear, William B. Samuels
1981, Open-File Report 81-316
The Alaskan Mineral Resource Assessment Program; background information to accompany folio of geologic and resources maps of the Chignik and Sutwik Island quadrangles, Alaska
Robert L. Detterman, J. E. Case, D. P. Cox, D.E. Detra, T. P. Miller, Frederic H. Wilson
1981, Circular 802
The Chignik and Sutwik Island quadrangles (1:250,000) are a part of the Alaska Peninsula in southwestern Alaska. This circular and a companion folio of maps represent results of integrated field and laboratory studies by an interdisciplinary team on geology, geophysics, geochemistry, mineral resources, geochronology, and energy resources to provide a...
Documentation of a dissolved-solids model of the Tongue River, southeastern Montana
Paul F. Woods
1981, Open-File Report 81-479
A model has been developed for assessing potential increases in dissolved solids of the Tongue River as a result of leaching of overburden materials used to backfill pits in surface coal-mining operations. The model allows spatial and temporal simulation of streamflow and dissolved-solids loads and concentrations under user-defined scenarios of...
A TI-59 calculator program for computation of Schlumberger resistivity sounding curves for models with as many as 25 horizontal layers
Ahmed Samir M. El Kahwagy
1981, Open-File Report 81-160
Water-quality reconnaissance of Harding Creek, Lawrence County, Arkansas
James C. Petersen
1981, Open-File Report 81-1058
A study of Harding Creek conducted between April and October 1980 to assess the water quality of the creek indicates no serious water-quality problems. Eight water samples were collected during periods of low to moderate streamflow (less than 19 cubic feet per second). The water was hard to very hard...
Selected biological characteristics of streams in the southeastern Uinta Basin, Utah and Colorado
Ronald W. Naten, Richard H. Fuller
1981, Open-File Report 81-644
Biological sampling was carried out during 1976-78 in five streams in the southeastern Uinta Basin, Utah and Colorado, in order to provide baseline water-quality data for an area of potential oil-shale development. The biological activity in the streams sampled generally is limited by physical factors more so than by chemical...
Selected hydrogeologic data from the Judith Basin, central Montana
Julianne F. Levings, Kent A. Dodge
1981, Open-File Report 81-1015
Selected hydrogeologic data from the Judith basin, central Montana, have been compiled for use as the physical basis of a ground-water model prepared as part of a 4-year study of Cenozoic and Mesozoic aquifers of the northern Great Plains area of Montana. Records of Cenozoic and Mesozoic aquifers of the...
Development of a quantitative model of stress in a seismic region as a basis for earthquake prediction
Keiiti Aki, Keiichiro Ikeda
1981, Open-File Report 81-269
