Ground-water models for water resource planning
J.E. Moore
1983, GeoJournal (7) 453-458
In the past decade hydrogeologists have emphasized the development of computer-based mathematical models to aid in the understanding of flow, the transport of solutes, transport of heat, and deformation in the ground-water system. These models have been used to provide information and predictions for water managers. Too frequently, ground-water was...
Mineral resource potential map of the Carson-Iceberg Roadless Areas, central Sierra Nevada, California
William J. Keith, Maurice A. Chaffee, Donald Plouff, Michael S. Miller
1983, Miscellaneous Field Studies Map 1416-B
No abstract available....
U-Th-Pb systematics of zircon inclusions in rock-forming minerals: A study of armoring against isotopic loss using the Sherman Granite of Colorado-Wyoming, USA
J. N. Aleinikoff
1983, Contributions to Mineralogy and Petrology (83) 259-269
Zircon inclusions were separated from the five major rock-forming minerals of the Sherman Granite of southern Wyoming, in order to evaluate the degree of discordance as a possible function of host minerals. U-Th-Pb isotopic ratios were determined for two size fractions of zircon inclusions from each mineral, plus five size...
Mapping the earthquake hazards of the Los Angeles region.
J. I. Ziony, J. C. Tinsley
1983, Earthquake Information Bulletin (USGS) (15) 134-141
Discusses examples of fault, shaking and ground-failure hazards taken from recent studies of the Los Angeles region. These should provide an improved basis for delineating geographic variations in local earthquake hazards. -M.Barrett...
Rainfall intensity-duration-frequency formulas.
Chiu-Lan Chen
1983, Journal of Hydraulic Engineering (109) 1603-1621
A new general rainfall intensity-duration-frequency formula is presented, utilizing a method similar to, but more accurate than one previously developed. The previously developed formula was based on the average depth-duration ratio of about 40% and the mean depth-frequency ratio of 1.48. It is shown that this formula is only a...
Geochemistry of the Chattanooga shale, Dekalb County, central Tennessee.
J.S. Leventhal, Paul H. Briggs, J.W. Baker
1983, Southeastern Geology (24) 101-116
This Upper Devonian shale is of interest because of its unusual enrichment in trace elements, especially U; a new chemical analysis for major, minor and trace elements is presented. Stable isotopes of carbon (organic) show delta 13C approx -29per mille and for total sulphur show -21 to -27per mille delta...
Earthquakes, March-April 1983
W. J. Person
1983, Earthquake Information Bulletin (USGS) (15) 189-194
March and April were quite active with widespread deaths and damage from earthquakes. There were two major (magnitude 7.0-7.9) earthquakes, one in the New Ireland region and the other in Costa Rica. The most devastating earthquake occurred in Colombia. deaths from earthquakes also occurred in Iran, Costa Rica, and Peru. The...
Nesting biology of laughing gulls in relation to agricultural chemicals in south Texas USA 1978-1981
Donald H. White, C. A. Mitchell, R. M. Prouty
1983, The Wilson Bulletin (95) 540-551
Various aspects of the breeding biology of Laughing Gulls (Larus atricilla) have been studied extensively in Florida (Dinsmore and Schreiber 1974, Schreiber et al. 1979, Schreiber and Schreiber 1980), New Jersey (Bongiorno 1970, Burger and Beer 1976, Burger 1976, Montevecchi 1978), and Massachusetts (Noble and Wurm 1943), but little is...
Mammoth Lakes earthquakes and ground uplift; precursors to possible volcanic activity?
R. A. Bailey
1983, Earthquake Information Bulletin (USGS) (15) 88-101
Memorial to a Black Turnstone: An examplar of breeding and wintering site fidelity
Robert E. Gill Jr., Colleen M. Handel, Leonard A. Shelton
1983, North American Bird Bander (8) 98-101
Most of us who have banded long-distance migrants are aware, through recaptures of individuals, of the high degree of site fidelity exhibited by many bird species. It is not uncommon for a bander to have a marked bird remain in the vicinity of its banding site throughout a season and...
Atlantic Flyway review: Region V: Laurel, Prince Georges County, MD (390-0765)
Chandler S. Robbins
1983, North American Bird Bander (8) 32-32
Nets were operated at this suburban backyard station before and after work during the week, and all day on as many weekends as possible, from 23 August to 30 November. A trip to Spain interrupted banding in mid-September and accounted for the drop in both species and individuals banded. This also...
Fission track dating of kimberlitic zircons
S.E. Haggerty, E. Raber, C. W. Naeser
1983, Earth and Planetary Science Letters (63) 41-50
The only reliable method for dating kimberlites at present is the lengthy and specialized hydrothermal procedure that extracts206Pb and238U from low-uranium zircons. This paper describes a second successful method by fission track dating of large single-crystal zircons, 1.0–1.5 cm in dimension. The use of large crystals overcomes the limitations imposed...
Faulting arrested by control of ground-water withdrawal in Houston, Texas
T. Holzer, R.K. Gabrysch, E.R. Verbeek
1983, Earthquake Information Bulletin (USGS) (15) 204-209
More than 86 historically active faults with an aggregate length of 150 miles have been identified within and adjacent to the Houston, Texas, metropolitan area. Although scarps of these faults grow gradually and without causing damaging earthquakes, historical fault offset has cost millions of dollars in damage to houses and...
Lead-isotopic compositions of diverse igneous rocks and ore deposits from southwestern New Mexico and their implications for early Proterozoic crustal evolution in the western United States
J. S. Stacey, D. C. Hedlund
1983, Geological Society of America Bulletin (94) 43-57
U-Pb zircon measurements from some of the basement rocks in southwestern New Mexico have ages that range from 1,650 to 1,450 m.y.The largest ore deposits occur near Silver City in the southwest part of the region studied. They are associated with Laramide alkali...
Solubility relations in the ternary system NaCl-CsCl-H2O at 1 atm. 1. Solubilities of halite from 20 to 100 °C
I.-M. Chou, R.D. Lee
1983, Journal of Chemical and Engineering Data (28) 390-393
Solubilities of halite in the ternary system NaCl-CsCl-H2O have been determined by the visual polythermal method at 1 atm from 20 to 100 °C along five constant CsCl/(CsCl + H2O) weight ratio lines. These five constant weight ratios are 0.1, 0.2, 0.3, 0.4, and 0.5. The maximum uncertainties in these...
Land-use planning: One geologist's viewpoint
E-An Zen
1983, Environmental Conservation (10) 97-104
Planning for the best use of land and its resources should take fully into consideration the long-term consequences of each type of use in order to stretch out most beneficially the well-being of society in the future, and to protect the integrity of the land and its...
Human interactions with ground-water
A. Zaporozec
1983, GeoJournal (7) 427-433
Ground-Water could be considered as an immense reservoir, from which only a certain amount of water can be withdrawn without affecting the quantity and quality of water. This amount is determined by the characteristics of the environment in which ground-water occurs and by the interactions of ground-water with precipitation, surface...
Euler-Lagrangian computation for estuarine hydrodynamics
Ralph T. Cheng
1983, Conference Paper, Numerical Methods in Laminar and Turbulent Flow, Proceedings of the International Conference
The transport of conservative and suspended matter in fluid flows is a phenomenon of Lagrangian nature because the process is usually convection dominant. Nearly all numerical investigations of such problems use an Eulerian formulation for the convenience that the computational grids are fixed in space and because the vast majority...
Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry
J.G. Crock, F.E. Lichte, Paul H. Briggs
1983, Geostandards Newsletter (7) 335-340
Two new geologic reference materials, issued by the National Bureau of Standards as standard reference materials, have been analyzed by a precise, accurate, and rapid method of analysis for their element content. The described procedure uses a multi‐acid, low temperature digestion in a closed teflon vessel, followed by the simultaneous...
Petrology and comparative thermal and mechanical histories of clasts in breccia 62236
Gordon L. Nord Jr., M.-V. Wandless
1983, Journal of Geophysical Research Solid Earth (88) A645-A657
Lunar breccia 62236 contains large lithic fragments of troctolite, norite, and anorthosite. The mafic phases, olivine, inverted pigeonite, and augite, fill interstitial areas between larger plagioclases and appear to be cumulate phases with extensive adcumulus growth. Pyroxene compositional homogeneity indicates that cation exchange during cooling was limited to an area...
Process and rate of dedolomitization: Mass transfer and C14 dating in a regional carbonate aquifer
W. Back, B.B. Hanshaw, Niel Plummer, P.H. Rahn, C.T. Rightmire, M. Rubin
1983, Geological Society of America Bulletin (94) 1415-1429
Regional dedolomitization is the major process that controls the chemical character of water in the Mississippian Pahasapa Limestone (Madison equivalent) surrounding the Black Hills, South Dakota and Wyoming. The process of dedolomitization consists of dolomite dissolution and concurrent precipitation of calcite; it is...
The magnetic field of the earth, 1980 magnetic total intensity
E. B. Fabiano, N.W. Peddie, A.K. Zunde
1983, IMAP 1461
No abstract available....
Chemistry and microbiology of a sewage spill in South San Francisco Bay
J. E. Cloern, R.S. Oremland
1983, Estuaries (6) 399-406
During three weeks of September 1979, the breakdown of a waste treatment plant resulted in the discharge of a large volume (1.5×107m3) of primary-treated sewage into a tributary of South San Francisco Bay, California. Chemical and microbial changes occurred within the tributary as decomposition and nitrification depleted dissolved oxygen. Associated...
The role of remotely sensed and other special data for predictive modeling: the Umatilla, Oregon example
Thomas R. Loveland, Gary E. Johnson
1983, Photogrammetric Engineering and Remote Sensing (49) 1183-1192
Landsat data and 1:24 000-scale aerial photographs were initially used to map the expansion of irrigation from 1973 to 1979 and to identify crops under irrigation in 1979. The crop data were then used with historical water requirement figures and digital topographic and hydrographic data to estimate water and power...
Land application of wastewater and its effect on ground-water quality in the Livermore-Amador Valley, Alameda County, California
M. A. Sylvester
1983, Water-Resources Investigations Report 82-4100
Ground-water quality, ground-water level, and rainfall data collected during the 1975 water year through the 1980 water year were analyzed to determine the effects of land application of effluent from wastewater treatment plants on ground-water quality in the Livermore-Amador Valley. Annual rainfall varied markedly during the study: 1976 and 1977...
