Short note; Detectability levels for central induction transient soundings
David V. Fitterman
1989, Geophysics (54) 127-129
A question usually asked during the planning of a transient sounding survey is, "Can information useful to solving the geologic problem at hand be obtained from the measurements?" This question is usually answered by constructing a geologic model for the survey area based upon the best available information to determine...
Physical and chemical characteristics of a metal-contaminated overbank deposit, west-central South Dakota, USA
D. C. Marron
1989, Earth Surface Processes and Landforms (14) 419-432
The deposit along the Belle Fourche River is typically up to 2 m thick and extends about 90 m away from the channel along the insides of meander bends. The sediments contain above-background levels of copper, iron, manganese, zinc, and particularly arsenic. An influx at high streamflow of uncontaminated sediment...
Influence of coupling of sorption and photosynthetic processes on trace element cycles in natural waters
C. C. Fuller, J.A. Davis
1989, Nature (340) 52-57
Chemical and biological processes have important roles in the transport and cycling of trace elements in natural waters, but their complex interactions are often not well understood. Trace-element concentrations may, for example, be controlled by adsorption-desorption reactions at mineral surfaces, with the equilibrium strongly influenced by pH. Variations in pH...
Quantitative dye-tracing of karst ground-water flow
James Smoot, Donald S. Mull, Timothy Liebermann
1989, Conference Paper
Analysis of the results of repeat quantitative dye traces between a sinkhole and a spring used for public water supply were used to describe predictive relations between discharge, mean travel time, apparent ground-water flow velocity and solute transport characteristics. Normalized peak concentration, mean travel time, and standard deviation of travel...
Evaluating geographic information systems technology
Stephen C. Guptill
1989, Photogrammetric Engineering and Remote Sensing (55) 1583-1587
Computerized geographic information systems (GISs) are emerging as the spatial data handling tools of choice for solving complex geographical problems. However, few guidelines exist for assisting potential users in identifying suitable hardware and software. A process to be followed in evaluating the merits of GIS technology is presented. Related standards...
Geochemical controls on vanadium accumulation in fossil fuels
G. N. Breit, R. B. Wanty
1989, Conference Paper, Preprints Symposia
High vanadium contents in petroleum and other fossil fuels have been attributed to organic-matter type, organisms, volcanic emanations, diffusion of sea water, and epigenetic enrichment. However, these factors are inadequate to account for the high abundance of vanadium in some fossil fuels and the paucity in others. By examining vanadium...
The use of total lake-surface area as an indicator of climatic change: Examples from the Lahontan basin
L. V. Benson, Frederick L. Paillet
1989, Quaternary Research (32) 262-275
Variation in the size of lakes in the Lahontan basin is topographically constrained. River diversion also has played a major role in regulating lake size in Lahontan subbasins. The proper gage of lake response to change in the hydrologic balance is neither lake depth (level) nor lake volume but instead...
Survey of three-dimensional numerical estuarine models
Ralph T. Cheng, Peter E. Smith
1989, Conference Paper
This paper surveys the existing 3-D estuarine hydrodynamic and solute transport models by a review of the commonly used assumptions and approximations, and by an examination of the methods of solution. The model formulations, methods of solution, and known applications are surveyed and summarized in tables. In conclusion, the authors...
High integrated fluid rock ratios during metamorphism at Naxos: evidence from carbon isotopes of calcite in schists and fluid inclusions - A dicussion of the paper by Kreulen (1988) (Contributions to mineralogy and petrology 98:28-32)
J.B.H. Jansen, Rijst H. Van der H., R. O. Rye, P.A.M. Andriessen, D.M. Rye
1989, Contributions to Mineralogy and Petrology (103) 123-126
[No abstract available]...
Mount St. Helens and Kilauea volcanoes
J. Barrat
1989, Earthquakes & Volcanoes (USGS) (21) 101-107
From the south, snow-covered Mount St. Helens looms proudly under a fleecy halo of clouds, rivaling the majestic beauty of neighboring Mount Rainer, Mount Hood, and Mount Adams. Salmon fishermen dot the shores of lakes and streams in the mountain's shadow, trucks loaded with fresh-cut timber barrel down backroads, and...
On the similarity of theories of anelastic and scattering attenuation
Leif Wennerberg, Arthur D. Frankel
1989, Bulletin of the Seismological Society of America (79) 1287-1293
We point out basic parallels between theories of anelastic and scattering attenuation. We consider approximations to scattering effects presented by O'Doherty and Anstey (1971), Sato (1982), and Wu (1982). We use the linear theory of anelasticity. We note that the frequency dependence of Q can be related to a distribution...
Non-energy resources, Connecticut and Rhode Island coastal waters
N.F. Neff, R. S. Lewis
1989, Marine Geology (90) 125-130
Cores collected from Long Island Sound, Connecticut, were used to establish control on the geologic framework of the area. Lithologic and stratigraphic analyses verified the presence of the following units: (1) Cretaceous coastal plain, (2) Pleistocene glacial till, (3) late Pleistocene...
Present-day biogeochemical activities of anaerobic bacteria and their relevance to future exobiological investigations
R.S. Oremland
1989, Advances in Space Research (9) 127-136
If the primordial atmosphere was reducing, then the first microbial ecosystem was probably composed of anaerobic bacteria. However, despite the presence of an oxygen-rich atmosphere, anaerobic habitats are important, commonplace components of the Earth's present biosphere. The geochemical activities displayed by these anaerobes impact the global cycling of certain elements...
Application of INEPT nitrogen-15 and silicon-29 nuclear magnetic resonance spectrometry to derivatized fulvic acids
K. A. Thorn, D.W. Folan, J.B. Arterburn, M.A. Mikita, P. MacCarthy
1989, Science of the Total Environment (81-82) 209-218
Use of the INEPT experiment has been examined in two derivatization studies of the Suwannee River fulvic acid. In the first study, the fulvic acid was derivatized with 15N enriched hydroxylamine. The quantitative 15N NMR spectrum, acquired with a 45° pulse angle, 2.0 second pulse delay and inverse gated decoupling,...
Spatial patterns of aftershocks of shallow focus earthquakes in California and implications for deep focus earthquakes
A.J. Michael
1989, Journal of Geophysical Research Solid Earth (94) 5615-5626
Previous workers have pioneered statistical techniques to study the spatial distribution of aftershocks with respect to the focal mechanism of the main shock. Application of these techniques to deep focus earthquakes failed to show clustering of aftershocks near the nodal planes of the main shocks. To better understand the behavior...
New fault picture points toward San Francisco Bay area earthquakes
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 116-120
Recent earthquakes and a new way of looking at faults suggest that damaging earthquakes are closing in on the San Francisco area. Earthquakes Awareness Week 1989 in northern California started off with a bang on Monday, 3 April, when a magnitude 4.8 earthquake struck 15 kilometers northeast of San Jose....
Taking the pulse of the San Andreas Fault
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 112-115
The ninth of January, 1989, was the 32nd anniversary of the great southern California earthquake of 1857. the latest research shows that, on average, at least part of the section of the San Andreas fault that broke then should break again this year. But the same research suggests that the fault's...
Answers from deep inside the Earth; Continental Scientific Drilling at Cajon Pass, California
D. P. Russ
1989, Earthquakes & Volcanoes (USGS) (21) 79-84
Drilling of a 12,000-foot-deep scientific well has been completed at Cajon Pass in southern California to measure crustal properties, to determine crustal structure, and to better understanding the generation of earthquakes along the San Andreas fault. A joint effort of the National Science Foundation (NFS) and the U.S Geological Survey...
Paleomagnetism and tectonic rotation of the lower Miocene Peach Springs Tuff: Colorado Plateau, Arizona, to Barstow, California
Ray E. Wells, John W. Hillhouse
1989, GSA Bulletin (101) 846-863
We have determined remanent magnetization directions of the lower Miocene Peach Springs Tuff at 41 localities in western Arizona and southeastern California. An unusual northeast and shallow magnetization direction confirms the proposed geologic correlation of isolated outcrops of the tuff from the Colorado Plateau to Barstow, California, a distance of...
Mechanisms of Cenozoic tectonic rotation, Pacific Northwest Convergent Margin, U.S.A.
Ray E. Wells
1989, Book chapter, Paleomagnetic rotations and continental deformation. NATO ASI Series (C: Mathematical and Physical Sciences)
Large clockwise rotations (15–80°) are characteristic of Cenozoic volcanic and sedimentary rocks along the convergent margin of the northwestern United States. Abundant paleomagnetic data from 62–12 m.y. old rocks in forearc, arc, and backarc regions show that rotation increases with age and with proximity to the coast. Paleomagnetic and structural...
Hydrologic studies of wetlands in the northern prairie
Thomas C. Winter
1989, Book chapter, Northern prairie wetlands
No abstract available....
Prescribed burning guidelines in the Northern Great Plains
Kenneth F. Higgins, James L. Piehl, Arnold D. Kruse
1989, Report
The use of fire to manage grasslands for wildlife is a relatively new management option for resource managers in the Northern Great Plains (NGP). Nearly all of the burning during the past 20-25 years has been conducted without the aid of specific guidelines for the region. This state-of-the-art set of...
Gopherus agassizii: Desert tortoise
Kristen H. Berry
Ian Richard Swingland, Michael W. Klemens, editor(s)
1989, Book chapter, The conservation biology of tortoises
The desert tortoise is one of four allopatric North American tortoises. It occurs in the Mojave and Sonoran deserts of the southwestern United States and Mexico.Auffenberg (1976) divided the genus Gopherus (consisting of four species, G. agassizi, G. berlandieri, G.flavomarginatus, and G. polyphemus) in two osteological groups. Bramble (1982), using...
The least Bell's vireo in southern California: Protection and management of an endangered species
B.E. Kus
1989, Conference Paper
No abstract available at this time...
The separation of the Hartland Formation and Ravenswood Granodiorite from the Fordham Gneiss at Cameron's Line in the New York City area
C.A. Baskerville, D.G. Mose
1989, Northeastern Geology (11) 22-28
Recent study of the rocks in City Water Tunnel Number 3 between Roosevelt Island and beneath 34th Street and the 63rd Street subway-rail tunnels at 41st Avenue in Long Island City, as well as study of drill core from other sites in western Queens, establishes that this area of New...
