Some significant records from instrumented structures in California - USGS program
M. Çelebi, E. Safak, R. Maley
1989, Conference Paper
The main objective in seismic instrumentation of structures is to facilitate response studies that lead to improved understanding of the dynamic behavior and the potential for damage to structures under seismic loading. The purpose of this paper is: (1) to review the status of the programs for strong-motion instrumentation of...
Water transport in limestone by X-ray CAT scanning
Victor G. Mossoti, Louis M. Castanier
1989, Conference Paper
The transport of water through the interior of Salem limestone test briquettes can be dynamically monitored by computer aided tomography (commonly called CAT scanning in medical diagnostics). Most significantly, unless evaporation from a particular face of the briquette is accelerated by forced air flow (wind simulation), the distribution of water...
Sedimentary framework of the southern Maine inner continental shelf: Influence of glaciation and sea-level change
J. T. Kelley, D. F. Belknap, R. C. Shipp
1989, Marine Geology (90) 139-147
Although the tidally influenced shoreline of Maine is longer than that of virtually any other state, almost no research on its geology has been published. In order to go some way towards remedying this, 1500 km of high-resolution seismic reflection data and 800 km of sidescan sonar imagery have been...
Urban flood frequency and hydrograph analysis
Vernon B. Sauer
1989, Conference Paper, Hydraulic engineering: 3rd national conference: Papers
A set of seven-parameter regression equations was developed for estimating flood discharges at ungaged areas. The regression equations can be used to estimate urban flood discharges throughout the United States for recurrence intervals from 2 through 500 years. The average standard errors of regression range from 37 percent for the...
Predicting earthquakes by analyzing accelerating precursory seismic activity
D. J. Varnes
1989, Pure and Applied Geophysics PAGEOPH (130) 661-686
During 11 sequences of earthquakes that in retrospect can be classed as foreshocks, the accelerating rate at which seismic moment is released follows, at least in part, a simple equation. This equation (1) is {Mathematical expression},where {Mathematical expression} is the cumulative sum until time, t, of the square roots of...
Isotopic determinations of rhenium and osmium in meteorites by using fusion, distillation and ion-exchange separations
J. W. Morgan, Richard J. Walker
1989, Analytica Chimica Acta (222) 291-300
A stable isotope-dilution method using resonance ionization mass spectrometry is suitable for the determination of rhenium and osmium abundances and osmium isotopic composition in carbonaceous chondrites and iron meteorites. The chemical procedure involves sodium peroxide fusion, followed by distillation of osmium from sulfuric acid/hydrogen peroxide and subsequent anion-exchange separation of...
Peak outflow from a breached embankment dam
David C. Froehlich
1989, Conference Paper
A relation for rapidly predicting the peak outflow rate from a breached embankment dam has been presented. The prediction equation is based on reliable data from 19 embankment dam failures and requires as input the volume of water in the reservoir at the time a breach begins to form, and...
Geohydrology of the Laura fresh-water lens, Majuro atoll: A hydrogeochemical approach
S. S. Anthony, F.L. Peterson, F.T. MacKenzie, S. N. Hamlin
1989, Geological Society of America Bulletin (101) 1066-1075
In small limestone islands, the depositional history and subsequent chemical interactions between ground water and the aquifer host rock play critical roles in the occurrence, movement, and chemical quality of ground water. The hydrogeochemistry of the Laura fresh-water lens, Majuro atoll, Marshall Islands, is an example of these relations.Laura is...
The competition between thermal contraction and differentiation in the stress history of the Moon
Randolph L. Kirk, David J. Stevenson
1989, Journal of Geophysical Research B: Solid Earth (94) 12133-12144
The scarcity of both extension and compression features on the Moon strongly constrains the history of the lunar radius—to variations of less than ±1 km over the past 3.8 Gyr. This limit has traditionally been interpreted as requiring a delicate balance between thermal contraction of the near‐surface and expansion of...
Significance of loessite in the Maroon Formation (Middle Pennsylvanian to Lower Permian), Eagle Basin, northwest Colorado
S. Y. Johnson
1989, Journal of Sedimentary Petrology (59) 782-791
Quaternary loess deposits are widespread on the earth's surface, yet pre-Quaternary loess deposits have rarely been reported. The Maroon Formation (Middle Pennsylvanian to Lower Permian) of the Eagle Basin, northwest Colorado, includes a siltstone-dominated facies interpreted as loessite (lithified loess) along its downwind...
Tectono-stratigraphic evolution of the Early Proterozoic Wisconsin magmatic terranes of the Penokean Orogen
P.K. Sims, W. R. Van Schmus, K. J. Schulz, Z. E. Peterman
1989, Canadian Journal of Earth Sciences (26) 2145-2158
The Early Proterozoic Penokean Orogen developed along the southern margin of the Archean Superior craton. The orogen consists of a northern deformed continental margin prism overlying an Archean basement and a southern assemblage of oceanic arcs, the Wisconsin magmatic terranes. The south-dipping Niagara fault (suture) zone separates the south-facing continental...
Geochemical processes controlling selenium in ground water after mining, Powder River Basin, Wyoming, U.S.A.
D. L. Naftz, J. A. Rice
1989, Applied Geochemistry (4) 565-575
Geochemical data for samples of overburden from three mines in the Powder River Basin indicate a statistically significant (0.01 confidence level) positive correlation (r = 0.74) between Se and organic C. Results of factor analysis with varimax rotation on the major and trace element data from the rock samples indicate large...
Igneous history of the Koyukuk terrane, western Alaska: Constraints on the origin, evolution, and ultimate collision of an accreted island arc terrane
S. E. Box, W. W. Patton Jr.
1989, Journal of Geophysical Research Solid Earth (94) 15843-15867
The Koyukuk terrane of western Alaska consists of volcanic, volcaniclastic, and plutonic rocks which range from Late Paleozoic to Early Cretaceous in age. The terrane crops out in a U-shaped belt which is roughly paralleled by outer belts of ultramafic rocks, oceanic plate basalts and cherts, and retrograded blueschist facies...
Simulation of precipitation by weather-type analysis
G. J. McCabe Jr., L.E. Hay, L.S. Kalkstein, M. A. Ayers, D.M. Wolock
1989, Conference Paper
A new approach that uses weather-type analysis as a basis for stochastic precipitation modeling was developed and tested for Philadelphia, Pennsylvania. The weather types permit the identification of weather conditions associated with varying frequencies, intensities, and amounts of precipitation. Weather-type frequencies were used to stochastically simulate precipitation for Philadelphia and...
Geotechnical, geological, and selected radionuclide retention characteristics of the radioactive waste disposal site near the Farallon Islands
J.S. Booth, W.J. Winters, L.J. Poppe, J. Neiheisel, R.S. Dyer
1989, Marine Geotechnology (8) 111-132
A geotechnical and geological investigation of the Farallon Islands low-level radioactive waste (LLW) disposal area was conducted to qualitatively assess the host sediments' relative effectiveness as a barrier to radionuclide migration, to estimate the portion of the barrier that is in contact with the waste packages at the three primary...
Sidescan sonar examination of deteriorated revetments and bulkheads along Chicago's lake front
Michael J. Chrzastowski
1989, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
Lakefill for parks along Chicago's lake front is primarily defended with aged, deteriorated revetments. Survey by 100- and 500-kHz sidescan sonar documents that structural failure of the revetments is not related to lake-bottom undermining. The size and weight of the rock fill in the cribs is identified as a critical...
Synfolding magnetization in the Jurassic Preuss Sandstone, Wyoming- Idaho-Utah thrust belt
M.R. Hudson, R. L. Reynolds, N.S. Fishman
1989, Journal of Geophysical Research Solid Earth (94) 13681-13705
The Jurassic Preuss Sandstone, exposed in five thrust plates of the Wyoming-Idaho-Utah thrust belt, carries directions of remanent magnetization that group most tightly after only partial unfolding. Field, petrographic, and rock magnetic evidence indicates that the carrier of this magnetization is detrital, low-Ti titanomagnetite. The detrital titanomagnetite was remagnetized at...
Local scour at bridge abutments
David C. Froehlich
1989, Conference Paper
Comparison of local scour depths at bridge abutments computed using different equations yields a large variation in predicted values. To consolidate the fragmented results of previous investigations and assemble the most comprehensive data set possible, reported laboratory measurements of local scour at the end of an obstruction protruding from the...
Response of selected binomial coefficients to varying degrees of matrix sparseness and to matrices with known data interrelationships
A.W. Archer, C.G. Maples
1989, Mathematical Geology (21) 741-753
Numerous departures from ideal relationships are revealed by Monte Carlo simulations of widely accepted binomial coefficients. For example, simulations incorporating varying levels of matrix sparseness (presence of zeros indicating lack of data) and computation of expected values reveal that not only are all common coefficients influenced by zero data, but...
Presumed drowning of Aleutian Canada geese on the Pacific coast of California and Oregon
Paul F. Springer, Roy W. Lowe, Richard K. Stroud, Patricia A. Gullett
1989, Journal of Wildlife Diseases (25) 276-279
Carcasses of 42 and 17 Aleutian Canada geese (Branta canadensis leucopareia), a federally listed endangered species, were found on ocean beaches near Crescent City, California, and near Pacific City, Oregon, respectively, following severe storms. Necropsies and other information suggest that the birds were flushed during the storms and somehow entered...
Effects of runoff changes and sea level rise on salinity in the Delaware River estuary
Roy A. Walters
1989, Conference Paper
The objective of this study is to investigate changes in the spatial distribution of salt in the Delaware Estuary resulting from climate induced changes in freshwater inflows and in the position of mean sea level. The approach adopted for this study is composed of two parts: An analysis of existing...
Historic surface slip along the San Andreas Fault near Parkfield, California
J. J. Lienkaemper, W.H. Prescott
1989, Journal of Geophysical Research Solid Earth (94) 17647-17670
The Parkfield Earthquake Prediction Experiment is focusing close attention on the 44-km-long section of the San Andreas fault that last ruptured seismically in 1966 (Ms 6.0). The 20-km-long central segment of the 1966 Parkfield rupture, extending from the mainshock epicenter at Middle Mountain southeastward to Gold Hill, forms a 1- to...
Quarterly Wildlife Mortality Report
K. A. Converse, R. Windingstad, K. Roertgen, T. Roffe
1989, Supplement to the Journal of Wildlife Diseases (25)
Sightability adjustment methods for aerial surveys of wildlife populations
R.K. Steinhorst, M.D. Samuel
1989, Biometrics (45) 415-425
Aerial surveys are routinely conducted to estimate the abundance of wildlife species and the rate of population change. However, sightability of animal groups is acknowledged as a significant source of bias in these estimates. Recent research has focused on the development of sightability models to predict the probability of sighting...
Structures associated with strike-slip faults that bound landslide elements
R. W. Fleming, A. M. Johnson
1989, Engineering Geology (27) 39-114
Large landslides are bounded on their flanks and on elements within the landslides by structures analogous to strike-slip faults. We observed the formation of thwse strike-slip faults and associated structures at two large landslides in central Utah during 1983-1985. The strike-slip faults in landslides are nearly vertical but locally may...
