Biological control of the removal of abiogenic particles from the surface ocean
W.G. Deuser, P.G. Brewer, T.D. Jickells, R.F. Commeau
1983, Science (219) 388-391
Concurrent measurements of particle concentrations in the near-surface water and of particle fluxes in the deep water of the Sargasso Sea show a close coupling between the two for biogenic components. The concentrations of suspended matter appear to follow an annual cycle similar to that of primary production and deepwater...
Phase relations in the system NaCl-KCl-H2O II: Differential thermal analysis of the halite liquidus in the NaCl-H2O binary above 450°c
W.D. Gunter, I.-M. Chou, Sven Girsperger
1983, Geochimica et Cosmochimica Acta (47) 863-873
Thermal analysis of the halite liquidus in the system NaCl-H2O has been conducted for NaCl mole fractions (XNaCl) greater than 0.25 (i.e., > 50 wt. % NaCl) at pressures between 0.3 and 4.1 kb and temperatures greater than 450°C. The position of the liquidus was located by differential thermal...
Cuprian fraipontite and sauconite from the Defiance-Silver Bill mines, Gleeson, Arizona.
E.E. Foord, J. E. Taggart, N. M. Conklin
1983, Mineralogical Record (14) 131-132
XRD studies have shown the fine-grained, light blue-green mineral previously identified as turquoise or chrysocolla to be the rare species fraipontite + or - admixed sauconite. Composite microprobe and XRF analyses gave SiO2 24.8, Al2O3 17.3, CaO 0.34, CuO 5.2, ZnO 40.95, H2O (ign. loss, 900oC) 12.8, = 101.39, yielding...
A procedure to estimate the parent population of the size of oil and gas fields as revealed by a study of economic truncation
J.H. Schuenemeyer, L.J. Drew
1983, Journal of the International Association for Mathematical Geology (15) 145-161
An estimation technique has been derived to predict the number of small fields in a geologic play or basin. Historically, many small oil and gas fields went unreported because they were not economical. This led to an underestimation of the number of undiscovered small fields. A study of the distributions...
EFFICIENT TRANSFER OF DATA BETWEEN MAPS OF DIFFERENT PROJECTIONS.
John P. Snyder
1983, Conference Paper, Technical Papers of the American Congress of Surveying and Mapping
There are several ways to transfer data from an existing map to another map by computer. If the projection and parameters of both maps are known, analytic formulas may be used to convert rectangular coordinates of the first map to latitude and longitude and then to rectangular coordinates of the...
Discussion of "A re-assessment of phase equilibria involving two liquids in the system K2O-Al2O3-FeO-SiO2," by G.M. Biggar
E. Roedder
1983, Contributions to Mineralogy and Petrology (82) 284-290
[No abstract available]...
Laser induced fluorescence spectra of fluorophenol cations in a Ne matrix
V.E. Bondybey, J.H. English, T.A. Miller, R.H. Shiley
1983, Journal of Chemical Physics (78) 2227-2230
Laser induced fluorescence and/or absorption spectra of the cations of 2,3,5,6‐tetrafluorophenol, 2,3,5,6‐tetrafluorothiophenol, and 3,5‐difluorophenol have been obtained in a Ne matrix. The spectra of C6HF4OH+ are much better resolved than in the gas phase. The gas phase congestion is likely caused by the near degeneracy of the and electronic...
Paleoceanographic implications of Miocene deep-sea hiatuses
G. Keller, J.A. Barron
1983, Geological Society of America Bulletin (94) 590-613
Miocene paleoceanographic evolution exhibits major changes resulting from the opening and closing of passages, the subsequent changes in oceanic circulation, and development of major Antarctic glaciation. The consequences and timing of these events can be observed in variations in the distribution of deep-sea...
A reexamination of the effects of adsorbates on the Raman spectrum of gibbsite
K.W. Cunningham, M. C. Goldberg
1983, Soil Science (136) 102-110
Previous workers have attributed substantial changes in the Raman intensities of the OH stretching bands in solid, powdered gibbsite of surface area 10 m2/g to surface interactions with the adsorbates 093Ca2+,HxPO43x- and SiO2.xH2O. These changes apparently resulted from an unsatisfactory Raman measurement procedure as a re-examination using an internal intensity...
Trends in Engineering Geologic and Related Mapping 1972–1983
David J. Varnes, Jeffrey R. Keaton
1983, Bulletin of the Association of Engineering Geologists (21) 255-267
Progress is reviewed that has been made during the period 1972-1982 in producing medium- and small-scale engineering geologic maps with a variety of content. Improved methods to obtain and present information are evolving. Standards concerning text and map content, soil and rock classification, and map symbols have been proposed. Application...
ESTIMATION OF RESPONSE-SPECTRAL VALUES AS FUNCTIONS OF MAGNITUDE, DISTANCE, AND SITE CONDITIONS.
W. B. Joyner, D.M. Boore
Chung Riley M.Lew H.S.Kovacs William D., editor(s)
1983, Conference Paper, National Bureau of Standards, Special Publication
Horizontal pseudo-velocity response was analyzed for twelve shallow earthquakes in western North America. Estimation of response-spectral values was related to magnitude, distance and site conditions. Errors in the methods are analyzed....
Objective procedures for lineament enhancement and extraction
G. K. Moore, F. A. Waltz
1983, Photogrammetric Engineering and Remote Sensing (49) 641-647
A longterm research goal at EROS Data Center is to develop automated, objective procedures for lineament mapping. In support of this goal, a five-step digital convolution procedure has been used to produce directionally enhanced images, which contain few artifacts and little noise. The main limitation of this procedure is that...
Present and former equilibrium-line altitudes near Mount Everest, Nepal and Tibet
V. S. Williams
1983, Arctic and Alpine Research (15) 201-211
New information on equilibrium-line altitudes (ELAs) of present and former glaciers in the Mount Everest area of eastern Nepal and southern Tibet has been derived from field mapping and interpretation of topographic maps and Landsat imagery. Present ELAs rise from south to north across the Himalayan Range from 5200 to...
Nonlinear strain buildup and the earthquake cycle on the San Andreas fault
W. Thatcher
1983, Journal of Geophysical Research Solid Earth (88) 5893-5902
Two contrasting models of the earthquake deformation cycle on strike slip faults predict significant temporal declines in shear strain rate near the fault, accompanied by a progressive broadening of the zone of deformation adjacent to it. In the thin lithosphere model, transient deformation results from flow in the asthenosphere due...
Historical changes to Lake Washington and route of the Lake Washington Ship Canal, King County, Washington
Michael J. Chrzastowski
1983, Water-Resources Investigations Report 81-1182
Lake Washington, in the midst of the greater Seattle metropolitan area of the Puget Sound region (fig. 1), is an exceptional commercial, recreational, and esthetic resource for the region . In the past 130 years, Lake Washington has been changed from a " wild " lake in a wilderness setting...
Surveyors, cartographers, photogrammetrists; identification friends or foes
Frederick J. Doyle
1983, Cartography (13) 88-95
Largely because of historical developments, the disciplines of geodesy, surveying, photogrammetry, cartography and remote sensing which make up the profession of cartographic science are organised into numerous societies at both the national and international levels. Partly as a consequence of this separatism, an effective education system for the profession is...
Comparison of analytical methods for the determination of silica in geothermal waters
J.C. Chemerys
1983, Journal of Volcanology and Geothermal Research (16) 57-63
The silica concentration of 26 Guatemalan geothermal waters were analyzed colorimetrically (spectrophotometrically) and by atomic absorption. Results by the atomic absorption method were less affected by polymerization and precipitation of silica from supersaturated solutions. Shaking the samples prior to analysis improves the accuracy of the atomic absorption results. The advantages...
Introduction of P. Jonathan Patchett for the F. W. Clarke Medal 1982
M. Tatsumoto
1983, Geochimica et Cosmochimica Acta (47) 984
No abstract available....
Consumption and growth of hybrid grass carp fed four vegetation diets and trout chow in circular tanks
J.V. Shireman, R.W. Rottmann, F.J. Aldridge
1983, Journal of Fish Biology (22) 685-693
Grass carp, Ctenopharyngodon idella, and hybrid grass carp (grass carp ♀× bighead carp ♀Aristichthys nobilis), were fed duckweed (Lemna sp.), hydrilla (Hydrilla verticillata), chara (Chara sp.), filamentous algae (Odogonium sp., Spirogyra sp.), and trout chow. Grass carp consumed all plants in greater amounts than hybrids. Grass carp grew best when fed hydrilla and trout chow and...
Effect of temperature on production of tiger muskellunge in intensive culture
J. W. Meade, W. F. Krise, T. Ort
1983, Aquaculture (32) 157-164
Tiger muskellunge (Esox masquinony × E. lucius) juveniles were reared at constant temperatures in the temperature range 14–28°C. For fish 3–4 cm long, growth, production and feed conversion efficiency were greatest at 20–22°C. Survival was reduced and unaccountable mortality (cannibalism index) was greatest at 24°C. Growth per unit of temperature...
An enriched finite element for simulation of groundwater flow to a well or drain - Comment
M. Kemblowski
1983, Journal of Hydrology (60) 381-382
No abstract available....
What's happening: Dr. S. F. Snieszko
G.S. Gutsell
1983, Fisheries (8) 35-35
No abstract available....
What's happening: Dr. James A. McCann
G.S. Gutsell
1983, Fisheries (8) 34-34
No abstract available....
Flocking and predator avoidance in wintering shorebirds
B.E. Kus
1983, Conference Paper
No abstract available at this time...
The 1979 Homestead Valley earthquake sequence, California: Control of aftershocks and postseismic deformation
R.S. Stein, M. Lisowski
1983, Journal of Geophysical Research Solid Earth (88) 6477-6490
The coseismic slip and geometry of the March 15, 1979, Homestead Valley, California, earthquake sequence are well constrained by precise horizontal and vertical geodetic observations and by data from a dense local seismic network. These observations indicate 0.52±0.10 m of right-lateral slip and 0.17±0.04 m of reverse slip on a...
