Robert E. Thaden
1990, Geologic Quadrangle 1646
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Publication Extents
Not all publications have extents, not all extents are completely accurateVirgil A. Trent, Frank Darwyn Spencer
1990, Geologic Quadrangle 1668
No abstract available....
Manuel Nathenson
1990, Open-File Report 90-671
B. Chouet, H. R. Shaw
1990, Journal of Geophysical Research (96) 10177-10189
Studies the fractal properties of shallow volcanic tremor and gas piston events associated with magma degassing at Kilauea Volcano, Hawaii, using data from two dense short-baseline arrays of seismographs deployed near the active crater of Puu Oo on the east rift of the volcano. The existence of a categorically stable...
William L. Hohman, Ronald D. Pritchert, Richard M. Pace III, Dennis W. Woolington, Robert Helm
1990, Journal of Wildlife Management (54) 211-215
We determined the prevalence of lead shotgun pellets in gizzards of canvasbacks (Aythya valisineria) collected at Catahoula Lake and the Mississippi River Delta, Louisiana, during winter 1987-88 to assess the influence of ingested lead shot on canvasback body mass. The prevalence of ingested lead shot was significantly higher at Catahoula...
Fred P. Meyer, Lee A. Barclay
1990, Resource Publication 177
PrefaceFish kills are graphic evidence of serious problems in a lake or stream. If the kill is related to the presence of toxic chemicals, there may be human health concerns, in addition to the obvious damage to the ecosystem and the fisheries resources. Depending on the cause of a fish...
Nicasio Sepulveda, A. L. Zack
J.H. Krishna, Vicente Quinones-Aponte, Fernando Gomez-Gomez, G.L. Morris, editor(s)
1990, Conference Paper, Tropical Hydrology and Caribbean Water Resources, Proceedings of the International Symposium on Tropical Hydrology
A laboratory experiment to measure the specific storage of an aquifer material was conducted. A known dead load, simulating an overburden load, was applied to a sample of completely saturated aquifer material contained inside a cylinder. After the dead load was applied, water was withdrawn from the sample, causing the...
Robert A. Renken, Rene A. Barker, Fernando Gomez-Gomez
1990, Conference Paper, Australia Water-Resources Council Conference Series no. 20.
Michael Ford, Jia Wang, Ralph T. Cheng
1990, Water Resources Research (26) 1027-1045
A two-dimensional laterally averaged numerical estuarine model is developed to study the vertical variations of tidal hydrodynamic properties in the central/north part of San Francisco Bay, California. Tidal stage data, current meter measurements, and conductivity, temperature, and depth profiling data in San Francisco Bay are used for comparison with model...
Daniel J. Goode, Leonard F. Konikow
1990, Water Resources Research (26) 2339-2351
This paper investigates the effects of large-scale temporal velocity fluctuations, particularly changes in the direction of flow, on solute spreading in a two-dimensional aquifer. Relations for apparent longitudinal and transverse dispersivity are developed through an analytical solution for dispersion in a fluctuating, quasi-steady uniform flow field, in which storativity is...
Daniel J. Cain, Samuel N. Luoma
1990, Marine Ecology Progress Series (60) 45-55
Temporal and spatial variations in Cu and Ag in the deposit-feeding clam Macoma balthica and in surficial sediments were analysed at 8 stations in San Francisco Bay at near-monthly intervals for periods ranging from 3 to 10 yr during 1977 to 1986. Strong seasonal variations in metal concentrations of M....
W. F. Smith-Vaniz, J.C. Quero, M. Desoutter
1990, Book chapter, Check-list of fishes of the eastern tropical Atlantic (CLOFETA)
No abstract available....
James T. Carlton, Janet K. Thompson, Laurence E. Schemel, Frederic H. Nichols
1990, Marine Ecology Progress Series (66) 81-94
The euryhaline bivalve mollusc Potamocorbula amurensis (family Corbulidae), a native of China, Japan, and Korea, has recently appeared and become very abundant in San Francisco Bay. This clam appears to have been introduced as veliger larvae in the seawater ballast of cargo vessels. It was first collected in northern San...
Hilary A. Neckles
1990, Conference Paper, The light requirements of seagrasses: Results and recommendations of a workshop
No abstract available....
James B. Johnston, Lawrence R. Handley
1990, Biological Report (90) 105-109
Over the past 10 years, the U.S. Fish and Wildlife Service's (FWS) National Wetlands Research Center (center; formerly the National Coastal Ecosystems Team) has been continuously involved in the production of maps for use by coastal decision makers. The types of maps produced by the center have been national, regional,...
L.N. Plummer, J.F. Busby, R. W. Lee, B.B. Hanshaw
1990, Water Resources Management (26) 1981-2014
Stable isotope data for dissolved carbonate, sulfate, and sulfide are combined with water composition data to construct geochemical reaction models along eight flow paths in the Madison aquifer in parts of Wyoming, Montana, and South Dakota. The sulfur isotope data are treated as an isotope dilution problem, whereas the carbon...
Louis Sileo, Paul Sievert, Michael D. Samuel, Stewart I. Fefer
1990, Conference Paper, Proceedings of the second international conference on marine debris
The prevalence of plastic in 18 species of seabirds at seven study sites in the Hawaiian Islands and Johnston Atoll was studied during 1986 and 1987. Stomach samples were collected by induced emesis from 1,803 live birds of 15 species and during necropsy of 277 dead birds of 5 species....
Jack B. Hartung, Michael J. Kunk, R. R. Anderson
1990, GSA Special Papers (247) 207-221
A problem with the impact hypothesis for the Cretaceous/Tertiary (K/T) mass extinction is the apparent absence of an identifiable impact site. The Manson impact structure is a candidate site because of its size (the largest such structure recognized in the United States); in addition, the largest and most abundant shocked...
A.V. Tsyban, R. N. Sambrotto, P.F. Roscigno
1990, Biological Report 90(13)
Zell E. Peterman, Richard W. Spengler, Kiyoto Futa, Brian D. Marshall
1990, Materials Research Society Symposium - Proceedings (212) 687-694
Core samples of the Topopah Spring Member of the Paintbrush Tuff from drill hole UE25A#1 were analyzed for Sr and Nd isotopes and selected minor and trace elements to constrain the origin of a zcolitized zone associated with the lower vitrophyre. The Sm-Nd radiogenic isotope system was unperturbed by the...
William L. Hohman, Dennis W. Woolington, J.H. Devries
1990, Canadian Journal of Zoology (68) 2605-2609
We studied the food habits of canvasbacks (Aythya valisineria) at Catahoula Lake (inland) and the Mississippi River Delta (coastal), Louisiana, from November 1987 to February 1988. Plant foods comprised >97 aggregate percent dry mass of the canvasback diet. The proportion of plant material eaten did not vary with sex, age,...
George W. Andrews
1990, Conference Paper, Proceedings of the tenth international diatom symposium
No abstract available....
Water Resources Division, U.S. Geological Survey
1990, Report
No abstract available....
William L. Hohman, D.P. Rave
1990, Wilson Bulletin (102) 645-654
We determined diurnal time-activity budgets of Canvasbacks (Aythya valisineria) at Catahoula Lake and at the Mississippi River Delta, Louisiana, from December 1987 to March 1988. Canvasback feeding, resting, locomotory, and comfort activities varied by month and location with a month-location interaction. Moreover, the percentage of time spent feeding varied by...
James B. Johnston
1990, Conference Paper, The environmental and economic status of the Gulf of Mexico : December 2-5, 1990, Clarion Hotel, New Orleans, Louisiana
No abstract available....