S. J. Grady
1997, ACS Division of Environmental Chemistry, Preprints (37) 392-394
[No abstract available]...
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Publication Extents
Not all publications have extents, not all extents are completely accurateB. R. Doe
1997, International Geology Review (39) 1053-1112
A database on a number of elements in oceanic volcanic rocks is presented, including the principal major-element oxides-SiO2, TiO2, Al2O3, Fe2O3(T), MnO, MgO, CaO, Na2O, K2O, and P2O5 (where T refers to total iron)–and the trace elements–Ba, Ce, Cr, Cu, Ni, Sc, Sr, V, Pb (mainly by isotope...
R.W. Harvey
1997, FEMS Microbiology Reviews (20) 461-472
Modern day injection and recovery techniques designed to examine the transport behavior of microorganisms in groundwater have evolved from experiments conducted in the late 1800s, in which bacteria that form red or yellow pigments were used to trace flow paths through karst and fractured- rock aquifers. A number of subsequent...
J.C. Jackson, G.E. Ericksent
1997, Revista Geologica de Chile (24) 45-54
Computer analysis of X-ray diffraction (XRD) data provides a simple method for determining the semiquantitative mineralogical composition of naturally occurring mixtures of saline minerals. The method herein described was adapted from a computer program for the study of mixtures of naturally occurring clay minerals. The program evaluates the relative intensities...
T.-S. Ma, M. Sophocleous, Y.-S. Yu, R. W. Buddemeier
1997, Journal of Hydrology (201) 120-137
The Great Bend Prairie freshwater alluvial aquifer in south-central Kansas overlies a bedrock brine aquifer of Permian age. The continuous extraction of freshwater mainly for irrigation in this area has accelerated the upward movement of the saltwater, resulting in the deterioration of water quality. Predicting saltwater upconing is critical for...
T.D. Hoisch, M.T. Heizler, R. E. Zartman
1997, Journal of Geophysical Research B: Solid Earth (102) 2815-2833
Crustal extension in the Bullfrog Hills and Bare Mountain area of southwest Nevada is associated with movement along a regional detachment fault. Normal faulting in the upper plate and rapid cooling (denudation) of the lower plate were coeval with Miocene silicic volcanism and with west-northwest transport along the detachment fault....
L. Gough, J.B. Grace
1997, Oecologia (112) 403-411
The effects of competitive suppression by vines on the non-vine plant community have received little attention in temperate habitats. This study investigated the impact vines have on their herbaceous hosts in a wetland community at two soil fertility levels. Plots in an oligohaline marsh were treated in a 2 x...
Klump J. Val, D.N. Edgington, P.E. Sager, Dale M. Robertson
1997, Canadian Journal of Fisheries and Aquatic Sciences (54) 10-26
The tributaries of Green Bay have long been recognized as major sources of phosphorus in the Lake Michigan basin. The status of Green Bay as a sink or source of phosphorus for Lake Michigan proper has been less well defined. The bay receives nearly 70% of its annual load of...
A. S. McEwen, D.P. Simonelli, D.R. Senske, K.P. Klaasen, L. Keszthelyi, T. V. Johnson, P.E. Geissler, M. H. Carr, M. J. S. Belton
1997, Geophysical Research Letters (24) 2443-2446
High-temperature hot spots on Io have been imaged at ∼50 km spatial resolution by Galileo's CCD imaging system (SSI). Images were acquired during eclipses (Io in Jupiter's shadow) via the SSI clear filter (∼0.4–1.0 µm), detecting emissions from both small intense hot spots and diffuse extended...
A.J. Michael
1997, Geophysical Research Letters (24) 1891-1894
Testing earthquake prediction methods requires statistical techniques that compare observed success to random chance. One technique is to produce simulated earthquake catalogs and measure the relative success of predicting real and simulated earthquakes. The accuracy of these tests depends on the validity of the statistical model...
C.-A. Huh, N. G. Pisias, J.M. Kelley, T.C. Maiti, A. Grantz
1997, Deep-Sea Research Part II: Topical Studies in Oceanography (44) 1725-1743
Sediment cores collected during R.V. Polar Sea AOS94 expedition from the Chukchi Shelf to the North Poke were analyzed for several decay-series natural radionuclides and Pu isotopes to study sedimentation rates and pathways of radionuclides in the western Arctic Ocean. The measured sedimentation rates vary by more than three orders...
J.J. Lorenz, C.C. McIvor, G.V.N. Powell, P. C. Frederick
1997, Wetlands (17) 346-359
We describe a 9 m2 drop net and removable walkways designed to quantify densities of small fishes in wetland habitats with low to moderate vegetation density. The method permits the collection of small, quantitative, discrete samples in ecologically sensitive areas by combining rapid net deployment from fixed sites with the carefully...
L.L. Jester, Michael A. Bozek, S.P. Sheldon, D.R. Helsel
1997, Great Lakes Entomologist (30) 169-176
The native aquatic weevil, Euhrychiopsis lecontei is currently being researched as a potential biological control for the exotic aquatic macrophyte Eurasian watermilfoil (Myriophyllum spicatum), yet little is known about its specific distribution in North America. In this study, E. lecontei was collected in 25 of 27 lakes surveyed for the...
Victor A. Drits, Jan Srodon, D. D. Eberl
1997, Clays and Clay Minerals (45) 461-475
The standard form of the Scherrer equation, which has been used to calculate the mean thickness of the coherent scattering domain (CSD) of illite crystals from X-ray diffraction (XRD) full width data at half maximum (FWHM) intensity, employs a constant, Ksh, of 0.89. Use of this constant is unjustified, even...
E. K. Franseen, R.H. Goldstein, M.R. Farr
1997, Journal of Sedimentary Research B: Stratigraphy and Global Studies (68) 283-292
Sequence stratigraphy, pinning-point relative sea-level curves, and magnetostratigraphy provide the quantitative data necessary to understand how rates of sea-level change and different substrate paleoslopes are dominant controls on accumulation rate, carbonate depositional sequence location, and internal architecture. Five third-order (1-10 my) and fourth-order...
W. B. Richardson, L.A. Bartsch
1997, Hydrobiologia (354) 141-150
We evaluated how water residence time mediated the impact of zebramussels Dreissena polymorpha and bluegill sunfish Lepomis macrochirus on experimental food webs established in1100-l outdoor mesocosms. Water residence time was manipulated asa surrogate for seston resupply – a critical variable affectinggrowth and survival of suspension-feeding invertebrates....
K.L. Othberg, P.A. McDaniel, M.A. Fosberg
1997, Northwest Science (71) 318-329
Study of a sequence of terraces in the western Snake River Plain of Idaho reveals a record of at least seven terraces, the ages of which span the Pleistocene. In the Boise Valley, the youngest terraces are less than -14,500 yr and the oldest terraces are -1.7 Ma. Within this...
Peter D. Warwick, Sharon S. Crowley, Leslie F. Ruppert, James Pontolillo
1997, International Journal of Coal Geology (34) 307-326
This study examined the petrographic and geochemical characteristics of two lignite beds (3500 and 4500 beds, Manning Formation, Jackson Group, Eocene) that are mined at the Gibbons Creek mine in east-central Texas. The purpose of the study was to identify the relations among sample ash yield, coal petrography, and trace-element...
V.G. Kossobokov, J. H. Healy, J. W. Dewey
1997, Pure and Applied Geophysics (149) 219-232
A test to evaluate earthquake prediction algorithms is being applied to a Russian algorithm known as M8. The M8 algorithm makes intermediate term predictions for earthquakes to occur in a large circle, based on integral counts of transient seismicity in the circle. In a retroactive prediction for the period January...
C. T. Roman, J.A. Peck, J.R. Allen, J.W. King, P.G. Appleby
1997, Estuarine, Coastal and Shelf Science (45) 717-727
Sediment accumulation rates were determined at several sites throughout Nauset Marsh (Massachusetts, U.S.A.), a back-barrier lagoonal system, using feldspar marker horizons to evaluate short-term rates (1 to 2 year scales) and radiometric techniques to estimate rates over longer time scales (137Cs,210Pb,14C). The barrier spit fronting theSpartina-dominated study site has a...
R. W. Carlson, W. D. Smythe, R. M. C. Lopes-Gautier, A. G. Davies, L.W. Kamp, J. A. Mosher, L.A. Soderblom, F.E. Leader, R. Mehlman, Roger N. Clark, F. P. Fanale
1997, Geophysical Research Letters (24) 2479-2482
The Galileo Near Infrared Mapping Spectrometer was used to investigate the distribution and properties of sulfur dioxide over the surface of Io, and qualitative results for the anti‐Jove hemisphere are presented here. SO2, existing as a frost, is found almost everywhere, but with spatially variable concentration. The exceptions are volcanic hot spots,...
R.W. Myster, J.R. Thomlinson, M. C. Larsen
1997, Landscape Ecology (12) 299-307
We explored the predictive value of common landscape characteristics for landslide vegetative stages in the Luquillo Experimental Forest of Puerto Rico using four different analyses. Maximum likelihood logistic regression showed that aspect, age, and substrate type could be used to predict vegetative structural stage. In addition it showed that the...
S. A. Spaulding, E. F. Stoermer
1997, Diatom Research (12) 95-113
Navicula gibbula Cleve and its allies have a number of morphological characters which are visible under the light microscope and distinguish them from taxa included in Navicula Bory sensu stricto. These include proximal raphe ends which are sharply and unilaterally hooked and often extend beyond the central area, as well as two apparently...
A. F. Glazner, D. M. Miller
1997, Geology (25) 1099-1102
Many granodiorite to diorite plutons in the Great Basin of western North America are surrounded by rim monoclines or anticlines that suggest relative downward movement of the plutons while wall rocks were hot and ductile. We propose that such plutons rise to a...
A.O. Bush, K. D. Lafferty, J.M. Font, A.W. Shostak
1997, Journal of Parasitology (83) 575-583
We consider 27 population and community terms used frequently by parasitologists when describing the ecology of parasites. We provide suggestions for various terms in an attempt to foster consistent use and to make terms used in parasite ecology easier to interpret for those who study free-living organisms. We suggest strongly...