Volcano growth and evolution of the island of Hawaii
James G. Moore, David A. Clague
1992, Geological Society of America Bulletin (104) 1471-1484
The seven volcanoes comprising the island of Hawaii and its submarine base are, in order of growth, Mahukona, Kohala, Mauna Kea, Hualalai, Mauna Loa, Kilauea, and Loihi. The first four have completed their shield-building stage, and the timing of this event can be determined from the depth of the slope...
Laboratory investigations on the role of sediment surface and ground water chemistry in transport of bacteria through a contaminated Sandy Aquifer
M. A. Scholl, R.W. Harvey
1992, Environmental Science & Technology (26) 1410-1417
No abstract available. ...
Bias in the analysis of geological materials for gold using current methods, by G.E.M. Hall et al.
J. B. McHugh, R. M. O’Leary
1992, Journal of Geochemical Exploration (42) 387-388
No abstract available....
Use of D-C resistivity to map saline ground water
Christina L. Stamos, Steven K. Predmore, Adel A. R. Zohdy
1992, Book, Irrigation and Drainage: Saving a Threatened Resource - In Search of Solutions, Proceedings of the Irrigation and Drainage Sessions at Water Forum '92
It has been estimated in previous studies that 23 square miles of the Oxnard aquifer, a member of a multi-layered aquifer system beneath the Oxnard plain in Ventura County, California, has been contaminated as a result of seawater intrusion. To investigate this and other potential sources of saline water, a...
Lead exposure and recovery rates of black ducks banded in Tennessee
Michael D. Samuel, E. Frank Bowers, J. Christian Franson
1992, Journal of Wildlife Diseases (28) 555-561
American black ducks (Anas rubripes) wintering in Tennessee during 1986 to 1988 were tested for exposure to lead. Twelve percent of the birds had blood lead concentrations exceeding 0.2 ppm. Significant differences in the prevalence of lead exposure were found for adults (14.4%) and juveniles (8.2%). Exposed birds had higher...
Subsidence of Surtsey volcano, 1967-1991
J.G. Moore, S. Jakobsson, J. Holmjarn
1992, Bulletin of Volcanology (55) 17-24
The Surtsey marine volcano was built on the southern insular shelf of Iceland, along the seaward extension of the east volcanic zone, during episodic explosive and effusive activity from 1963 to 1967. A 1600-m-long, east-west line of 42 bench marks was established across the island shortly after volcanic activity stopped....
Sulfate retention and release in soils at Panola Mountain, Georgia
J. B. Shanley
1992, Soil Science (153) 499-508
Inorganic sulfate pools, sulfate sorption characteristics, and Fe and Al fractions were determined on soils at Panola Mountain, a 41-ha forested watershed in the Georgia Piedmont. Sulfate sorption properties of these soils fall along a continuum between two end members. The "low-adsorbing' end member comprises shallow soils (0-10 cm), with...
A relation among geology, tectonics, and velocity structure, western to central Nevada Basin and Range
R. D. Catchings
1992, Geological Society of America Bulletin (104) 1178-1192
In the northwestern to central Nevada Basin and Range, there are correlations between velocity and specific geologic structures of the crust. Mapped range-bounding faults at the surface can be traced to appreciable (10 km) depths based on velocity variations and are consistent with...
Pesticides in Iowa precipitation
B.K. Nations, G.R. Hallberg
1992, Journal of Environmental Quality (21) 486-492
Rainfall was sampled for pesticides to assess their occurrence in precipitation and potential impacts on water resources. Three areas in Iowa were sampled; two localities were in rural settings, and a third in an urban area. Fourteen pesticides, including ten herbicides and four insecticides, were detected...
Was disease involved in the decimation of Guam's avifauna?
Julie A. Savidge, Louis Sileo, Lynne M. Siegfried
1992, Journal of Wildlife Diseases (28) 206-214
Between 1982 and 1986, 402 (290 live, 112 dead) exotic, migrant or native resident birds on Guam were surveyed for disease-causing agents to determine the role of disease in the decline of native forest bird populations on Guam. Traumatic injury, primarily from collisions with motor vehicles and predation, was the...
The study of the undiscovered mineral resources of the Tongass National Forest and adjacent lands, Southeastern Alaska
D. A. Brew, L.J. Drew, S. D. Ludington
1992, Nonrenewable Resources (1) 303-322
The quantitative probabilistic assessment of the undiscovered mineral resources of the 17.1-million-acre Tongass National Forest (the largest in the United States) and its adjacent lands is a nonaggregated, mineral-resource-tract-oriented assessment designed for land-planning purposes. As such, it includes the renewed use of gross-in-place values (GIPV's) in dollars of the estimated...
The biogeochemical cycling of trace metals in the water column of Lake Sammamish, Washington: Response to seasonally anoxic conditions
Laurie S. Balistrieri, J.W. Murray, B. Paul
1992, Limnology and Oceanography (37) 529-548
Total acid‐soluble and dissolved Cd, Co, Cr, Cu, Ni, Pb, and Zn concentrations in the water column of a seasonally anoxic lake (Lake Sammamish, Washington) were measured on a monthly basis during the course of a year. These data, in conjunction with Fe, Mn, sulfide, and nutrient...
Fault growth and acoustic emissions in confined granite
David A. Lockner, James D. Byerlee
1992, Applied Mechanics Reviews (45) S165-S173
The failure process in a brittle granite was studied by using acoustic emission techniques to obtain three dimensional locations of the microfracturing events. During a creep experiment the nucleation of faulting coincided with the onset of tertiary creep, but the development of the fault could not be followed because the...
The hydrodynamics of the Big Horn basin: A study of the role of faults
J.D. Bredehoeft, K. Belitz, S. Sharp-Hansen
1992, American Association of Petroleum Geologists Bulletin (76) 530-546
A three-dimensional mathematical model simulates virgin groundwater flow in the Big Horn basin, Wyoming. The computed results are compared to two published interpretations of the Tensleep Sandstone virgin potentiometric surface; both of these interpretations, Bredehoeft and Bennett, and Haun, were made from the same data set. The published maps are...
Reduction of uranium by Desulfovibrio desulfuricans
Derek R. Lovley, Elizabeth J.P. Phillips
1992, Applied and Environmental Microbiology (58) 850-856
The possibility that sulfate-reducing microorganisms contribute to U(VI) reduction in sedimentary environments was investigated. U(VI) was reduced to U(IV) when washed cells of sulfate-grown Desulfovibrio desulfuricans were suspended in a bicarbonate buffer with lactate or H2 as the electron donor. There was no U(VI) reduction in the absence of an...
Imaging of Venus from Galileo: Early results and camera performance
M. J. S. Belton, P. Gierasch, K.P. Klaasen, C.D. Anger, M. H. Carr, C. R. Chapman, M. E. Davies, R. Greeley, R. Greenberg, J.W. Head, G. Neukum, C.B. Pilcher, J. Veverka, F. P. Fanale, A.P. Ingersoll, J.B. Pollock, D. Morrison, M.C. Clary, W. Cunningham, H. Breneman
1992, Advances in Space Research (12) 91-103
Three images of Venus have been returned so far by the Galileo spacecraft following an encounter with the planet on UT February 10, 1990. The images, taken at effective wavelengths of 4200 and 9900 A??, characterize the global motions and distribution of haze near the Venus cloud tops and, at...
Reconnaissance exploration geochemistry in the central Brooks Range, northern Alaska: Implications for exploration of sediment-hosted zinc-lead-silver deposits
K.D. Kelley, D. L. Kelley
1992, Journal of Geochemical Exploration (42) 273-300
A reconnaissance geochemical survey was conducted in the southern Killik River quadrangle, central Brooks Range, northern Alaska. The Brooks Range lies within the zone of continuous permafrost which may partially inhibit chemical weathering and oxidation. The minus 30-mesh and nonmagnetic heavy-mineral...
Types of phreatomagmatic volcanoes in the western Snake River Plain, Idaho, USA
M.M. Godchaux, B. Bonnichsen, M.D. Jenks
1992, Journal of Volcanology and Geothermal Research (52) 1-25
The western Snake River Plain graben in southwestern Idaho includes a large hydrovolcanic field which was produced in late Miocene to Pleistocene time by the interaction of rising basaltic magmas with the waters and water-saturated deposits of an enormous freshwater lake, Lake Idaho. The phreatomagmatic volcanoes in this field may...
Tecuamburro Volcano, Guatemala: Exploration geothermal gradient drilling and results
S.J. Goff, F. Goff, C. J. Janik
1992, Geothermics (21) 483-502
Results of geological, volcanological, hydrogeochemical, and geophysical field studies conducted in 1988 and 1989 at the Tecuamburro geothermal site, Guatemala, indicate that there is a substantial shallow heat source beneath the area of youngest volcanism. Gases from acid-sulfate springs near Laguna Ixpaco consistently yield maximum estimated subsurface temperatures of 300°C....
Surface chemistry associated with the cooling and subaerial weathering of recent basalt flows
A. F. White, M.F. Hochella Jr.
1992, Geochimica et Cosmochimica Acta (56) 3711-3721
The surface chemistry of fresh and weathered historical basalt flows was characterized using surface-sensitive X-ray photoelectron spectroscopy (XPS). Surfaces of unweathered 1987–1990 flows from the Kilauea Volcano, Hawaii, exhibited variable enrichment in Al, Mg, Ca, and F due to the formation of refractory fluoride compounds and pronounced depletion in Si...
Selenium and boron in aquatic birds from central California
Fred L. Paveglio, Christine M. Bunck, Gary H. Heinz
1992, Journal of Wildlife Management (56) 31-42
Subsurface agricultural drainwater used for marsh management has resulted in trace element contamination of aquatic bird food chains in central California. Consequently, we collected breeding and wintering aquatic birds from the Grassland Water District (GWD) of California during 1985-88 to measure selenium (Se) and boron (B) contamination resulting from use...
Retention of visible implant tags in lake trout and Atlantic salmon
H. L. Kincaid, G.T. Calkins
1992, Progressive Fish-Culturist (54) 163-170
Retention and readability of visible implant (VI) tags were evaluated in adult (2‐yearold) Atlantic salmon (Salmo salar), adult (4‐year‐old) lake trout (Salvelinus namaycush), and yearling (10‐month‐old) fish of both species. Tags were implanted in adipose eyelid tissue posterior to the eye. After 10 months, retention in yearlings was 49% by...
ALVIN investigation of an active propagating rift system, Galapagos 95.5° W
R.N. Hey, J.M. Sinton, M.C. Kleinrock, R.N. Yonover, K.C. MacDonald, S.P. Miller, R. C. Searle, D.M. Christie, T.M. Atwater, Norman H. Sleep, H. Paul Johnson, C.A. Neal
1992, Marine Geophysical Research (14) 207-226
ALVIN investigations have defined the fine-scale structural and volcanic patterns produced by active rift and spreading center propagation and failure near 95.5° W on the Galapagos spreading center. Behind the initial lithospheric rifting, which is propagating nearly due west at about 50 km m.y.−1, a triangular block of preexisting...
Phosphate and iron limitation of phytoplankton biomass in Lake Tahoe
Cecily C.Y. Chang, J.S. Kuwabara, S.P. Pasilis
1992, Canadian Journal of Fisheries and Aquatic Sciences (49) 1206-1215
Bioassays were carried out to assess the response of inoculated, single-species diatom populations (Cyclotella meneghiniana and Aulocosiera italica) to additions of synthetic chelators and phosphate. A chemical speciation model along with the field data was also used to predict how trace metal speciation, and hence bioavailability, was affected by the...
Depositional and tectonic framework of the rift basins of Lake Baikal from multichannel seismic data
D. R. Hutchinson, A.J. Golmshtok, L.P. Zonenshain, T.C. Moore, C.A. Scholz, Kim D. Klitgord
1992, Geology (20) 589-592
Recent multichannel seismic reflection data from Lake Baikal, located in a large, active, continental rift in central Asia, image three major stratigraphic units totalling 3.5 to 7.5 km thick in four subbasins. A major change in rift deposition and faulting between the oldest and middle-rift units probably corresponds to the...
