Mineralogical maturity in dunefields of North America, Africa and Australia
D.R. Muhs
2004, Geomorphology (59) 247-269
Studies of dunefields in central and western North America show that mineralogical maturity can provide new insights into the origin and evolution of aeolian sand bodies. Many of the world's great sand seas in Africa, Asia and Australia are quartz-dominated and thus can be considered to be mineralogically mature. The...
Assessing development pressure in the Chesapeake Bay watershed: An evaluation of two land-use change models
Peter R. Claggett, Claire A. Jantz, S.J. Goetz, C. Bisland
2004, Environmental Monitoring and Assessment (94) 129-146
Natural resource lands in the Chesapeake Bay watershed are increasingly susceptible to conversion into developed land uses, particularly as the demand for residential development grows. We assessed development pressure in the Baltimore-Washington, DC region, one of the major urban and suburban centers in the watershed. We explored the utility of...
Origin of placer laurite from Borneo: Se and As contents, and S isotopic compositions
K.H. Hattori, L.J. Cabri, B. Johanson, M. L. Zientek
2004, Mineralogical Magazine (68) 353-368
We examined grains of the platinum-group mineral, laurite (RuS2), from the type locality, Pontyn River, Tanah Laut, Borneo, and from the Tambanio River, southeast Borneo. The grains show a variety of morphologies, including euhedral grains with conchoidal fractures and pits, and spherical grains with no crystal faces, probably because of...
The effects of macroinvertebrate taxonomic resolution in large landscape bioassessments: An example from the Mid-Atlantic Highlands, U.S.A.
I.R. Waite, A.T. Herlihy, D. P. Larsen, N.S. Urquhart, D.J. Klemm
2004, Freshwater Biology (49) 474-489
1. During late spring 1993-1995, the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP) sampled 490 wadeable streams in the mid-Atlantic Highlands (MAH) of the U.S. for a variety of physical, chemical and biological indicators of environmental condition. We used the resulting data set to evaluate the importance...
Distribution of total and methyl mercury in sediments along Steamboat Creek (Nevada, USA)
J. Stamenkovic, M.S. Gustin, M. C. Marvin-DiPasquale, B.A. Thomas, J.L. Agee
2004, Science of the Total Environment (322) 167-177
In the late 1800s, mills in the Washoe Lake area, Nevada, used elemental mercury to remove gold and silver from the ores of the Comstock deposit. Since that time, mercury contaminated waste has been distributed from Washoe Lake, down Steamboat Creek, and to the...
Temporal changes in water quality at a childhood leukemia cluster
R. L. Seiler
2004, Ground Water (42) 446-455
Since 1997, 15 cases of acute lymphocytic leukemia and one case of acute myelocytic leukemia have been diagnosed in children and teenagers who live, or have lived, in an area centered on the town of Fallon, Nevada. The expected rate for the population is about one case every five years....
Remote sensing and the optical properties of the narrow cylindrical leaves of Juncus roemerianus
Elijah W. Ramsey III, A. Rangoonwala
2004, IEEE Transactions on Geoscience and Remote Sensing (42) 1064-1075
To develop a more complete foundation for remote sensing of the marsh grass Juncus roemerianus, we measured the optical properties of its cylindrical leaves at sites of different canopy height, biomass composition and amount, and connectivity to ocean flushing. To measure the leaf optical properties, we adapted a technique used...
Effects of lowhead dams on riffle-dwelling fishes and macroinvertebrates in a Midwestern river
J.S. Tiemann, D.P. Gillette, M. L. Wildhaber, D.R. Edds
2004, Transactions of the American Fisheries Society (133) 705-717
Many studies have assessed the effects of large dams on fishes and macroinvertebrates, but few have examined the effects of lowhead dams. We sampled fishes, macroinvertebrates, habitat, and physicochemistry monthly from November 2000 to October 2001 at eight gravel bar sites centered around two lowhead dams on the Neosho River,...
Mapping of the Culann-Tohil region of Io from Galileo imaging data
D.A. Williams, Paul M. Schenk, Jeffrey M. Moore, Laszlo P. Keszthelyi, Elizabeth P. Turtle, Windy L. Jaeger, Jani Radebaugh, Moses P. Milazzo, Rosaly Lopes, Ronald Greeley
2004, Icarus (169) 80-97
We have used Galileo spacecraft data to produce a geomorphologic map of the Culann–Tohil region of Io's antijovian hemisphere. This region includes a newly discovered shield volcano, Tsũi Goab Tholus and a neighboring bright flow field, Tsũi Goab Fluctus, the active Culann Patera and the enigmatic Tohil Mons-Radegast Patera–Tohil Patera complex. Analysis...
Complex proximal deposition during the Plinian eruptions of 1912 at Novarupta, Alaska
Bruce F. Houghton, C. J. N. Wilson, J. Fierstein, W. Hildreth
2004, Bulletin of Volcanology (66) 95-133
Proximal (<3 km) deposits from episodes II and III of the 60-h-long Novarupta 1912 eruption exhibit a very complex stratigraphy, the result of at least four transport regimes and diverse depositional mechanisms. They contrast with the relatively simple stratigraphy (and inferred emplacement mechanisms) for the previously documented, better known, medial-distal...
Toward mapping surface deformation in three dimensions using InSAR
Tim J. Wright, Barry E. Parsons, Zhong Lu
2004, Geophysical Research Letters (31)
One of the limitations of deformation measurements made with interferometric synthetic aperture radar (InSAR) is that an interferogram only measures one component of the surface deformation — in the satellite's line of sight. We investigate strategies for mapping surface deformation in three dimensions by using multiple interferograms, with different imaging...
The relationship between gorgonian coral (Cnidaria: Gorgonacea) diseases and African dust storms
J. R. Weir-Brush, V.H. Garrison, G.W. Smith, E.A. Shinn
2004, Aerobiologia (20) 119-126
The number of reports of coral diseases has increased throughout the world in the last 20 years. Aspergillosis, which primarily affects Gorgonia ventalina and G. flabellum, is one of the few diseases to be characterized. This disease is caused by Aspergillus sydowii, a terrestrial fungus with a worldwide distribution. Upon...
Cormorant predation and the population dynamics of walleye and yellow perch in Oneida Lake
L. G. Rudstam, A.J. VanDeValk, C.M. Adams, J.T.H. Coleman, J.L. Forney, M. E. Richmond
2004, Ecological Applications (14) 149-163
Double-crested Cormorants (Phalacrocorax auritus) increased dramatically in North America during the 1990s, providing the opportunity to study the effects of an increase of a top predator on an existing predator-prey system. In Oneida Lake, New York, USA, Double-crested Cormorants were first observed nesting in 1984 and had increased to over...
Temporal and geographic variation in survival of juvenile black brant
David H. Ward, Joel A. Schmutz, James S. Sedinger, Karen S. Bollinger, P. D. Martin, B.A. Anderson
2004, Condor (106) 263-274
First-year survival has important implications for the structure and growth of populations. We examined variation in seasonal survival of first-year Pacific Black Brant (Branta bernicla nigricans) marked late in summer in Alaska at two brood-rearing areas on the Yukon-Kuskokwim Delta (Tutakoke and Kokechik) and one area on the Arctic Coastal...
The final Galileo SSI observations of Io: Orbits G28-I33
Elizabeth P. Turtle, Laszlo P. Keszthelyi, Alfred S. McEwen, Jani Radebaugh, Moses P. Milazzo, Damon P. Simonelli, Paul E. Geissler, David A. Williams, Jason Perry, Windy L. Jaeger, Kenneth P. Klaasen, H. Herbert Breneman, Tilmann Denk, Cynthia B. Phillips
2004, Icarus (169) 3-28
We present the observations of Io acquired by the Solid State Imaging (SSI) experiment during the Galileo Millennium Mission (GMM) and the strategy we used to plan the exploration of Io. Despite Galileo's tight restrictions on data volume and downlink capability and several spacecraft...
Movement, home range, and site fidelity of bluegills in a Great Plains Lake
C.P. Paukert, D.W. Willis, M.A. Bouchard
2004, North American Journal of Fisheries Management (24) 154-161
Little is known about the distribution, movement, and home ranges of bluegills Lepomis macrochirus in lentic environments. Therefore, the objectives of this study were to evaluate the seasonal and diel differences in movement rates, site fidelity, and home range of bluegills in a shallow, natural Great Plains lake. A total...
Methods for estimating adsorbed uranium(VI) and distribution coefficients of contaminated sediments
M. Kohler, G.P. Curtis, D.E. Meece, J.A. Davis
2004, Environmental Science & Technology (38) 240-247
Assessing the quantity of U(VI) that participates in sorption/desorption processes in a contaminated aquifer is an important task when investigating U migration behavior. U-contaminated aquifer sediments were obtained from 16 different locations at a former U mill tailings site at Naturita, CO (U.S.A.) and were extracted with an artificial groundwater,...
Carbonate sediment deposits on the reef front around Oahu, Hawaii
M. A. Hampton, C.T. Blay, C.J. Murray
2004, Marine Georesources and Geotechnology (22) 65-102
Large sediment deposits on the reff front around Oahu are a possible resource for replenishing eroded beaches. High-resolution subbottom profiles clearly depict the deposits in three study areas: Kailua Bay off the windward coast, Makua to Kahe Point off the leeward coast, and Camp Erdman to Waimea off the north...
Petrographic and geochemical contrasts and environmentally significant trace elements in marine-influenced coal seams, Yanzhou mining area, China
Gaisheng Liu, P. Yang, Z. Peng, C. L. Chou
2004, Journal of Asian Earth Sciences (23) 491-506
The Yanzhou mining area in west Shandong Province, China contains coals of Permian and Carboniferous age. The 31 and 32 seams of the Permian Shanxi Formation and seams 6, 15-17 of the Carboniferous Taiyuan Formation were analyzed for coal petrology, mineralogy and geochemical parameters. The parameters indicate that the coal...
Relatedness and nesting dispersion within breeding populations of Greater White-fronted Geese
A. C. Fowler, J.M. Eadie, Craig R. Ely
2004, Condor (106) 600-607
We studied patterns of relatedness and nesting dispersion in female Pacific Greater White-fronted Geese (Anser albifrons frontalis) in Alaska. Female Greater White-fronted Geese are thought to be strongly philopatric and are often observed nesting in close association with other females. Analysis of the distribution of nests on the Yukon-Kuskokwim Delta...
Losses to single-family housing from ground motions in the 1994 Northridge, California, earthquake
R. L. Wesson, D. M. Perkins, E. V. Leyendecker, R.J. Roth Jr., M.D. Petersen
2004, Earthquake Spectra (20) 1021-1045
The distributions of insured losses to single-family housing following the 1994 Northridge, California, earthquake for 234 ZIP codes can be satisfactorily modeled with gamma distributions. Regressions of the parameters in the gamma distribution on estimates of ground motion, derived from ShakeMap estimates or from interpolated observations, provide a basis for...
Spatial variations in the frequency-magnitude distribution of earthquakes at Mount Pinatubo volcano
J.J. Sanchez, S.R. McNutt, J.A. Power, M. Wyss
2004, Bulletin of the Seismological Society of America (94) 430-438
The frequency-magnitude distribution of earthquakes measured by the b-value is mapped in two and three dimensions at Mount Pinatubo, Philippines, to a depth of 14 km below the summit. We analyzed 1406 well-located earthquakes with magnitudes MD ???0.73, recorded from late June through August 1991, using the maximum likelihood method....
The Meteoritical Bulletin, No. 88, 2004 July
Sara S. Russell, L. Folco, Monica M. Grady, M.E. Zolensky, R. Jones, K. Righter, J. Zipfel, J. N. Grossman
2004, Meteoritics and Planetary Science (39)
The Meteoritical Bulletin No. 88 lists information for 1610 newly classified meteorites, comprising 753 from Antarctica, 302 from Africa, 505 from Asia (495 of which are from Oman), 40 from North America, 5 from South America, 4 from Europe, and 1 of unknown origin. Information is provided for 9 falls...
Geophysical modeling of the northern Appalachian Brompton-Cameron, Central Maine, and Avalon terranes under the New Jersey Coastal Plain
T.J. Maguire, R. E. Sheridan, R.A. Volkert
2004, Journal of Geodynamics (37) 457-485
A regional terrane map of the New Jersey Coastal Plain basement was constructed using seismic, drilling, gravity and magnetic data. The Brompton-Cameron and Central Maine terranes were coalesced as one volcanic island arc terrane before obducting onto Laurentian, Grenville age, continental crust in the Taconian orogeny [Rankin, D.W., 1994. Continental...
Geologic history of natural coal-bed fires, Powder River basin, USA
E.L. Heffern, D. A. Coates
2004, International Journal of Coal Geology (59) 25-47
Coal-bed fires ignited by natural processes have baked and fused overlying sediments to form clinker, a hard red or varicolored rock, through much of the northern Great Plains of the United States (USA). The gently dipping coal beds in the region burn when regional downwasting brings them above the local...
