Earthquakes, January-February 1988
W. J. Person
1988, Earthquakes & Volcanoes (USGS) (20) 124-128
There was one major earthquake (7.0-7.9) during this reporting period, located in the Philippine Islands on February 24. The first earthquake-related deaths fro the year were reported in South Africa, Bangladesh, and California. In the United States, Southern California experienced a moderate earthquake on February 11. ...
Determining baseline element composition of lichens. II. Hypogymnia enteromorpha and Usnea spp. at Redwood National Park, California
L. P. Gough, L. L. Jackson, J.A. Sacklin
1988, Water, Air, & Soil Pollution (38) 169-180
Hypogymnia enteromorpha and Usnea spp. were collected in the Little Bald Hills ultramafic region of Redwood National Park, California, to establish element-concentration norms. Baselines are presented for Ba, Ca, Cu, Mn, Ni, P, Sr, V, and Zn for both lichen species; for Li, Mg, and K for H. enteromorpha; and for Al, Ce, Cr,...
Earthquakes, May-June 1988
W. J. Person
1988, Earthquakes & Volcanoes (USGS) (20) 196-198
There were no major earthquakes during the months of May and June. Only one earthquake-related death was reported; this occurred on June 20 in the Philippine Islands. In the United States, three moderate earthquakes were expereinced in California but none crashed deaths or injuries. ...
Historical vignettes of the 1881, 1901, 1922, 1934, and 1966 Parkfield earthquakes
D. Thomason
1988, Earthquakes & Volcanoes (USGS) (20) 52-55
Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA)
Marc D. Castle, Beth A. Christensen, Tonie E. Rocke
1988, Journal of Wildlife Diseases (24) 88-96
One hundred twenty-three of 300 blood samples (41%) taken from Rio Grande wild turkeys (Meleagris gallopavo intermedia) from three locations in southern Texas (Welder Wildlife Refuge, Chaparrosa Ranch, and Campo Alegre Ranch) and subinoculated into domestic broad-breasted white turkey poults were positive for a Plasmodium (Novyella) sp. Analysis of blood films from...
Earthquakes, March-April 1988
W. J. Person
1988, Earthquakes & Volcanoes (USGS) (20) 167-171
There were two major earthquakes (7.0-7.9) during this reporting period. the first, a magnitude 7.6, was centered in the Gulf of Alaska on March 6 and the second, a magnitude 7.0, occurred near the coast of southern Peru on April 12. In the United States, the largest earthquake was the magnitude...
Salton Sea Scientific Drilling Program
J.H. Sass
1988, Earthquakes & Volcanoes (USGS) (20) 156-160
The Salton Sea Scientific Drilling Program (SSSDP) was the first large-scale drilling project undertaken by the U.S Continental Scientific Drilling Program. The objectives of the SSSDP were (1) to drill a deep well into the Salton Sea Geothermal Field in the Imperial Valley of California, (2) to retrieve a high...
Effect of α-damage on fission-track annealing in zircon
Masao Kasuya, Charles W. Naeser
1988, International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements (14) 477-480
The thermal stability of confined fission-track lengths in four zircon samples having different spontaneous track densities (i.e., different amounts of ??-damage) has been studied by one-hour isochronal annealing experiments. The thermal stability of spontaneous track lengths is independent of initial spontaneous track density. The thermal stability of induced track lengths...
Early Cretaceous paleolatitude of the Yukon-Koyukuk province, Alaska
John W. Hillhouse, C. S. Grommé
1988, Journal of Geophysical Research Solid Earth (93) 11735-11752
We report results from a paleomagnetic study of the Yukon-Koyukuk province, a key region for reconstructing the Cretaceous paleogeography of northern Alaska and northeastern Asia. The province lies between the displaced continental fragment of Arctic Alaska and the accreted terranes of southern Alaska. Although Lower Cretaceous volcanogenic rocks of the...
Hydrogen concentrations as an indicator of the predominant terminal electron-accepting reactions in aquatic sediments
Derek R. Lovley, S. Goodwin
1988, Geochimica et Cosmochimica Acta (52) 2993-3003
Factors controlling the concentration of dissolved hydrogen gas in anaerobic sedimentary environments were investigated. Results, presented here or previously, demonstrated that, in sediments, only microorganisms catalyze the oxidation of H2 coupled to the reduction of nitrate, Mn(IV), Fe(III), sulfate, or carbon dioxide. Theoretical considerations suggested that, at steady-state conditions, H2...
The development of the continental margin of eastern North America-conjugate continental margin to West Africa
William P. Dillon, J. S. Schlee, Kim D. Klitgord
1988, Journal of African Earth Sciences (7) 361-367
The continental margin of eastern North America was initiated when West Africa and North America were rifted apart in Triassic-Early Jurassic time. Cooling of the crust and its thinning by rifting and extension caused subsidence. Variation in amounts of subsidence led to formation of five basins....
The radiocarbon budget for Mono Lake: An unsolved mystery
W.S. Broecker, R. Wanninkhof, G. Mathieu, T.-H. Peng, S. Stine, S. Robinson, A. Herczeg, M. Stuiver
1988, Earth and Planetary Science Letters (88) 16-26
Since 1957 the 14C/C ratio of the dissolved inorganic carbon in Mono Lake has risen by about 60‰. The magnitude of this increase is about four times larger than that expected from the invasion of bomb-produced14C from the atmosphere. We have eliminated the following explanations: (1) measurement error, (2) an unusually...
Determining baseline element composition of lichens. I. Parmelia sulcata at Theodore Roosevelt National Park, North Dakota
L. P. Gough, R. C. Severson, L. L. Jackson
1988, Water, Air, & Soil Pollution (38) 157-167
Element-concentration baselines are given for Parmelia sulcata and associated soils. Parmelia chlorochroa was found sporadically and therefore only representative concentration ranges are reported for this species. Element data include (1) for lichens; Al, As, Ba, B, Ca, Cr, Cu, Fe, Hg, Mn, Ni, P, Sr, S, Ti, V, Y, and Zn; and (2) for...
Eutrophication of lakes and reservoirs: A framework for making management decisions
W. Rast, M. Holland
1988, Ambio (17) 2-12
The development of management strategies for the protection of environmental quality usually involves consideration both of technical and nontechnical issues. A logical, step-by-step framework for development of such strategies is provided. Its application to the control of cultured eutrophication of lakes and reservoirs illustrates its potential usefulness. From the perspective...
Characterization of humic acid fractions by C-13 nuclear magnetic resonance spectroscopy
Robert L. Wershaw, Kevin A. Thorn, D.J. Pinckney
1988, Environmental Technology Letters (9) 53-62
Soil humic acids from different environments were fractionated by adsorption chromatography on Sephadex and characterized by C‐13 nuclear magnetic resonance (NMR) spectroscopy. The C‐13 NMR spectra of the fractions consist of some sharp, well‐resolved lines and some broad bands in contrast to the spectra of the unfractionated humic acids, where...
Leachate generated by an oil-and-gas brine pond site in North Dakota
E.C. Murphy, A.E. Kehew, G.H. Groenewold, W.A. Beal
1988, Groundwater (26) 31-38
Two unlined ponds were used for holding and evaporation of brines produced with oil and gas at a well site in north-central North Dakota. The brine-evaporation ponds were in use from 1959 up to the late 1970s when they were backfilled and leveled. Continued salt-water...
Radioactive and nonradioactive solutes in drinking water from Rn-charging devices
E. R. Landa, C.L. Miller, R.F. Brich
1988, Health Physics (54) 99-106
[No abstract available]...
Analytical approach to calculation of response spectra from seismological models of ground motion
Erdal Safak
1988, Earthquake Engineering and Structural Dynamics (16) 121-134
An analytical approach to calculate response spectra from seismological models of ground motion is presented. Seismological models have three major advantages over empirical models: (1) they help in an understanding of the physics of earthquake mechanisms, (2) they can be used to predict ground motions for future earthquakes and (3)...
The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults
R.S. Stein, G.C.P. King, J. B. Rundle
1988, Journal of Geophysical Research Solid Earth (93) 13319-13331
A strong test of our understanding of the earthquake cycle is the ability to reproduce extant fault-bounded geological structures, such as basins and ranges, which are built by repeated cycles of deformation. Along strike-slip faults, the coseismic and interseismic deformation can be nearly equal in magnitude and opposite in sign,...
Vapor-dominated zones within hydrothermal systems: Evolution and natural state
S. E. Ingebritsen, M.L. Sorey
1988, Journal of Geophysical Research Solid Earth (93) 13635-13655
Three conceptual models illustrate the range of hydrothermal systems in which vapor-dominated conditions are found. The first model (model I) represents a system with an extensive near-vaporstatic vapor-dominated zone and limited liquid throughflow and is analogous to systems such as The Geysers, California. Such systems can evolve within low-permeability barriers...
Using exogenous variables in testing for monotonic trends in hydrologic time series
William M. Alley
1988, Water Resources Research (24) 1955-1961
One approach that has been used in performing a nonparametric test for monotonic trend in a hydrologic time series consists of a two-stage analysis. First, a regression equation is estimated for the variable being tested as a function of an exogenous variable. A nonparametric trend test such as...
Preliminary observations of streamflow generation during storms in a forested Piedmont watershed using temperature as a tracer
J. B. Shanley, N.E. Peters
1988, Journal of Contaminant Hydrology (3) 349-365
Variations in streamwater temperature at the outlet of a 41-ha forested watershed at Panola Mountain in the Georgia Piedmont indicate that the initial rapid hydrologic response is caused by a combination of groundwater discharge and channel interception of rainwater. A storm in May 1986 caused a rapid increase in discharge...
Geochemistry of some gases in hydrothermal fluids from the southern Juan de Fuca Ridge
William C. Evans, L. D. White, J. B. Rapp
1988, Journal of Geophysical Research Solid Earth (93) 15305-15313
Five samples of hydrothermal fluids from two vent areas on the southern Juan de Fuca Ridge were analyzed for dissolved gases. Concentrations in the end-member hydrothermal fluid of H2 (270–527 μmol/kg), CH4 (82–118 μmol/kg), and CO2 (3920–4460 μmol/kg) are well above values in ambient seawater and are similar to concentrations reported for other...
Deuterium in interstitial water from deep-sea cores
I. Friedman, K. Hardcastle
1988, Journal of Geophysical Research Solid Earth (93) 8249-8263
As part of the Joint Oceanographic Institutions Deep Earth Sampling project, the interstitial waters of cores from 69 holes were sampled for deuterium analysis. Sixteen of the cores penetrated sediments as old as Eocene, and several sampled Cretaceous sediments, which allowed us to examine changes in the deuterium content of...
Multitemporal Landsat multispectral scanner and thematic mapper data of the Hubbard Glacier region, southeast Alaska
K.-M. Walker, C. Zenone
1988, Photogrammetric Engineering and Remote Sensing (54) 373-376
In late May 1986, the advancing Hubbard Glacier blocked the entrance to Russell Fiord near Yakutat, Alaska, creating a large ice-dammed lake. Runoff from the surrounding glaciated mountains raised the level of the lake to about 25 m above sea level by 8 October, when the ice dam failed. Remote...
