Dissolved organic matter in anoxic pore waters from Mangrove Lake, Bermuda
W. H. Orem, Patrick G. Hatcher, E.C. Spiker, N.M. Szeverenyi, G.E. Maciel
1986, Geochimica et Cosmochimica Acta (50) 609-618
Dissolved organic matter and dissolved inorganic chemical species in anoxic pore water from Mangrove Lake, Bermuda sediments were studied to evaluate the role of pore water in the early diagenesis of organic matter. Dissolved sulphate, titration alkalinity, phosphate, and ammonia concentration versus depth profiles were typical of many nearshore clastic sediments and...
LIMESTONE AND MARBLE DISSOLUTION BY ACID RAIN: AN ONSITE WEATHERING EXPERIMENT.
Michael M. Reddy, Susan I. Sherwood, B. R. Doe
Baboian Robert, editor(s)
1986, Conference Paper, ACS Symposium Series
In this paper the authors describe an experimental research program, conducted in conjunction with the National Acidic Precipitation Assessment Program (NAPAP), to quantify acid-rain damage to commercial and cultural carbonate-rock resources. Initial results of this experiment show that carbonate-rock dissolution and associated surface recession increase with increasing acid deposition to...
STRONG-MOTION INSTRUMENTATION OF STRUCTURES IN CHARLESTON, SOUTH CAROLINA AND ELSEWHERE.
M. Çelebi, R. Maley
1986, Conference Paper
Instrumentation of structures is part of earthquake hazard mitigation program of many institutions, including the United States Geological Survey (USGS). The USGS Strong-Motion Instrumentation of Structures Program is designed to complement other programs and to implement its own, within budget and other constraints. This paper reviews the overall national effort,...
Comments on 'Remarks on the secular change in the energy density spectrum of the geomagnetic field' by Joachim Meyer.
L.R. Alldredge
1986, Journal of Geomagnetism & Geoelectricity (38) 171-172
Meyer has discussed only the Rn aspect of the Alldredge (1984) paper he is criticising. He has ignored the pictorial demonstration of the need for higher harmonics to properly describe the secular variation field than the main field as demonstrated. This more or less independent demonstration supports the general conclusion...
The Valley and Ridge Province of eastern Pennsylvania - Stratigraphic and sedimentologic contributions and problems
Jack B. Epstein
1986, Geological Journal (21) 283-306
Many contributions that have led to a better understanding of Appalachian geology have resulted directly from work in the folded Appalachian Mountain and Great Valley sections of the Valley and Ridge physiographic province of eastern Pennsylvania. Disagreements have been common since H.D. Rogers first described the geology of the area...
URBAN STORMWATER-QUALITY INVESTIGATIONS BY THE USGS.
Marshall E. Jennings, Timothy L. Miller
Urbonas BenRoesner Larry A., editor(s)
1986, Conference Paper
U. S. Geological Survey (USGS) urban stormwater investigations, in cooperation with local and Federal agencies, have produced significant national data bases of information and enhanced understanding of urban hydrologic processes. Studies in progress include statistical regionalization of urban stormwater quality, the effects of stormwater detention on water quality, ways of...
Depositional environments of the Rock Springs Formation, southwest flank of the Rock Springs Uplift, Wyoming.
M.A. Kirschbaum
1986, Mountain Geologist (23) 63-75
This deltaic Upper Cretaceous Rock Springs Formation of the Mesaverde Group was deposited during early Campanian time near the end of the regressive phase of the Niobrara cyclothem. On the southwest end of the Uplift, part of the delta system is exposed near the seaward edge of a series of...
Geophysics: A reversal of geomagnetic polarity
Edward A. Mankinen
1986, Physics Bulletin (37) 287-288
The detailed behaviour of the geomagnetic field during reversals is documented by palaeomagnetists to constrain models of the geomagnetic dynamo. Reversals are studied by measuring the magnetic remanence preserved in rocks to obtain both the direction and intensity of the ancient magnetic field....
Late Cenozoic Arctic Ocean sea ice and terrestrial paleoclimate
L. D. Carter, J. Brigham-Grette, L. Marincovich Jr., V.L. Pease, John W. Hillhouse
1986, Geology (14) 675-678
Sea otter remains found in deposits of two marine transgressions (Bigbendian and Fishcreekian) of the Alaskan Arctic Coastal Plain which occurred between 2.4 and 3 Ma suggest that during these two events the southern limit of seasonal sea ice was at least 1600...
Stratigraphy and correlation of glacial deposits of the Rocky Mountains, the Colorado Plateau and the ranges of the great basin
G.M. Richmond
1986, Quaternary Science Reviews (5) 99-127
[No abstract available]...
ANALYSIS OF STRONG-MOTION EARTHQUAKE RECORDS FROM A WELL-INSTRUMENTED EARTH DAM.
Joseph J. Fedock
1986, Conference Paper
Strong-motion records from Long Valley Dam during the Mammoth Lakes earthquake sequence of May 1980 are analyzed to determine the main features of the dam's motions. The dam was instrumented with 22 accelerometers on its embankment and in the immediate vicinity, and more than 60 high-quality, long-duration accelerograms were recorded...
Geochemical maps showing distribution and abundance of copper in two fractions of stream-sediment concentrates, Silver City 1° x 2° quadrangle, New Mexico and Arizona
K. C. Watts, J.R. Hassemer, C.L. Forn, D. F. Siems
1986, Miscellaneous Field Studies Map 1183-B
No abstract available....
Summary geochemical maps for samples of rock, stream sediment, and nonmagnetic heavy-mineral concentrates, Carson-Iceberg and Leavitt Lake Roadless Areas, Alpine, Mono, and Tuolumne counties, California
M.A. Chaffee
1986, Miscellaneous Field Studies Map 1416-C
The Carson-Iceberg and Leavitt Lake Roadless Areas (the study area) lie near the crest of the Sierra Nevada in central California. The study area encompasses approximately 219,630 acres in the Stanislaus and Toiyabe National Forests in Alpine, Mono, and Tuolumne Counties. The area is dominated by rugged topography typical of...
Summation of Quaternary glaciations in the United States of America
G.M. Richmond, D. S. Fullerton
1986, Quaternary Science Reviews (5) 183-196
[No abstract available]...
A computerized particle-size analysis system
L.J. Poppe, A.H. Eliason, J.J. Fredericks
1986, Computers & Geosciences (12) 93-96
[No abstract available]...
Potentiometric surface of the Floridan aquifer system in the Suwannee River Water Management District, Florida, May 1985
Jack C. Rosenau, Paul E. Meadows
1986, Water-Resources Investigations Report 86-4184
The potentiometric surface map of the Floridan aquifer system in the Suwannee River Water Management District depicts the level to which water rose in tightly cased wells that tap the Floridan aquifer system in May 1985. The Floridan aquifer is the principal source of freshwater for north Florida. The surface...
Stratigraphic setting and mineralogy of the Arctic volcanogenic massive sulfide prospect, Ambler district, Alaska
J.M. Schmidt
1986, Economic Geology (81) 1619-1643
The Arctic prospect, south central Brooks Range, is among the 30 largest of 508 volcanic-hosted massive sulphide deposits in the world. The massive sulphide lenses are interlayered with graphitic schist between metamorphosed rhyolite porphyries in Middle Devonian to early Mississippian metamorphosed volcanic, volcaniclastic and sedimentary rocks. Hydrothermal alteration is of...
Snow chemistry of the Cascade-Sierra Nevada Mountains
L.B. Laird, Howard E. Taylor, V. C. Kennedy
1986, Environmental Science & Technology (20) 275-290
This investigation assesses geographic variations in atmospheric deposition in Washington, Oregon, and California using snow cores from the Cascade-Sierra Nevada Mountains, collected from late February to mid-March 1983. A statistical analysis of the analytical and sampling precision was made. The snowpack in the higher Cascades and Sierra Nevada is not...
Economic Losses and Fatalities Due to Landslides
Robert L. Schuster, Robert W. Fleming
1986, Bulletin of the Association of Engineering Geologists (23) 11-28
Annual losses in the United States, Japan, Italy, and India have been estimated at 1 billion or more each. During the period 1971-74, nearly 600 people per year were killed by landslides worldwide; about 90 percent of these deaths occurred in the Circum-Pacific region. From 1967-82, 150 people per year...
A new model for humic materials and their interactions with hydrophobic organic chemicals in soil-water or sediment-water systems
R.L. Wershaw
1986, Journal of Contaminant Hydrology (1) 29-45
A generalized model of humic materials in soils and sediments, which is consistent with their observed properties, is presented. This model provides a means of understanding the interaction of hydrophobic pollutants with humic materials. In this model, it is proposed that the humic materials in soils and sediments consist of...
A comparison of several methods for the solution of the inverse problem in two-dimensional steady state groundwater flow modeling
Logan K. Kuiper
1986, Water Resources Research (22) 705-714
Two geostatistical approaches for the estimation of hydraulic conductivity and hydraulic head from hydraulic conductivity and hydraulic head measurements are developed for two-dimensional steady flow with sinks. For both approaches the field of the logarithm of hydraulic conductivity (log-conductivity) is represented as a random field with mean θ1+θ2x+θ3y where xand y denote Cartesian coordinates,...
A Brief History of the U.S. Geological Survey
Mary C. Rabbitt
1986, Book
Kinetics of reduction of plutonium(VI) and neptunium(VI) by sulfide in neutral and alkaline solutions
K.L. Nash, J.M. Cleveland, J.C. Sullivan, M. Woods
1986, Inorganic Chemistry (25) 1169-1173
No abstract available....
Stochastic analysis of three-dimensional flow in a bounded domain
R.L. Naff, A. V. Vecchia
1986, Water Resources Research (22) 695-704
A commonly accepted first-order approximation of the equation for steady state flow in a fully saturated spatially random medium has the form of Poisson's equation. This form allows for the advantageous use of Green's functions to solve for the random output (hydraulic heads) in terms of a convolution over the...
Phytoplankton spatial distribution in south San Francisco Bay: mesoscale and small-scale variability
Thomas M. Powell, James E. Cloern, Roy A. Walters
Douglas A. Wolfe, editor(s)
1986, Book chapter, Estuarine variability
Horizontal transects of surface salinity and in-vivo fluorescence indicate the existence of three distinct spatial regimes in South San Francisco Bay. A mid-Bay region of low phytoplankton biomass with little small-scale variance is bounded to the north and south by water masses having higher in-vivo fluorescence and enhanced small-scale variability....
