The Blake Nose Cretaceous-Paleogene (Florida Atlantic margin, ODP Leg 171 B): An exemplar record of the Maastrichtian-Danian transition
J. #NAME? Bellier, S. Marca, Richard D. Norris, D. Kroon, A. Klaus, I. T. Alexander, L. P. Bardot, Charles E. Barker, Charles D. Blome, L. J. Clarke, J. Erbacher, K. L. Faul, M. A. Holmes, Brian T. Huber, Miriam E. Katz, Kenneth G. MacLeod, F. C. Martinez-Ruiz, I. Mita, M. Nakai, James G. Ogg, Dorothy K. Pak, T. K. Pletsch, Jean Self-Trail, N. J. Shackleton, J. Smit, William Ussler III, David K. Watkins, J. Widmark, Paul A. Wilson
1997, Comptes Rendus de l'Academie des Sciences - Serie IIa: Sciences de la Terre et des Planetes (325) 499-504
During ODP Leg 171B, devoted to the analysis of the Blake Plateau margin in front of Florida, 16 holes have been drilled in 5 distinct sites. The sites have documented a sedimentary succession ranging in age from Aptian to Eocene. Emphasis has been put on critical periods, comprising the Paleocene-Eocene...
Diverse primitive magmas in the Cascade arc, Northern Oregon and Southern Washington
R. M. Conrey, D. R. Sherrod, P. R. Hooper, D. A. Swanson
1997, Canadian Mineralogist (35) 367-396
Bulk-rock major- and trace-element composition, petrography and mineral compositions are presented for a diverse suite of 22 primitive mafic lavas in the Cascade Range of northern Oregon and southern Washington. With the exception of an early Western Cascade basalt, all the rocks are younger than 7 Ma. Intensive parameters [F(H2O),...
222Rn transport in a fractured crystalline rock aquifer: Results from numerical simulations
P. F. Folger, E. Poeter, R. B. Wanty, W. Day, D. Frishman
1997, Journal of Hydrology (195) 45-77
Dissolved 222Rn concentrations in ground water from a small wellfield underlain by fractured Middle Proterozoic Pikes Peak Granite southwest of Denver, Colorado range from 124 to 840 kBq m-3 (3360-22700 pCi L-1). Numerical simulations of flow and transport between two wells show that differences in equivalent hydraulic aperture of transmissive...
Rare-earth metal prices in the USA ca. 1960 to 1994
James B. Hedrick
1997, Journal of Alloys and Compounds (250) 471-481
Rare-earth metal prices were compiled from the late 1950s and early 1960s through 1994. Although commercial demand for rare-earth metals began in 1908, as the alloy mischmetal, commercial quantities of a wide range of individual rare-earth metals were not available until the late 1950s. The discovery of a large, high-grade...
Mechanism of SO2 removal by carbon
Anthony A. Lizzio, Joseph A. DeBarr
1997, Energy and Fuels (11) 284-291
The reaction of SO2 with carbon (C) in the presence of O2 and H2O involves a series of reactions that leads to the formation of sulfuric acid as the final product. The rate-determining step in the overall process is the oxidation of...
Winter CO2 fluxes in a boreal forest
G.C. Winston, E.T. Sundquist, B.B. Stephens, S.E. Trumbore
1997, Journal of Geophysical Research D: Atmospheres (102) 28795-28804
We measured soil respiration during two winters in three different ecotypes of the BOREAS northern study area. The production of CO2 was continuous throughout the winter and, when totaled for the winter of 1994–1995, was equivalent to the release of ∼40–55 g C/m2 from the soil surface. As soils cooled in the...
Rare-earth metal prices in the USA ca. 1960 to 1994
J.B. Hedrick
1997, Journal of Alloys and Compounds (250) 471-481
Rare-earth metal prices were compiled from the late 1950s and early 1960s through 1994. Although commercial demand for rare-earth metals began in 1908, as the alloy mischmetal, commercial quantities of a wide range of individual rare-earth metals were not available until the late 1950s.The discovery of a large, high-grade rare-earth deposit...
Slope basins, headless canyons, and submarine palaeoseismology of the Cascadia accretionary complex
B. G. McAdoo, Daniel L. Orange, Elizabeth Screaton, H. Lee, Robert Kayen
1997, Basin Research (9) 313-324
A combination of geomorphological, seismic reflection and geotechnical data constrains this study of sediment erosion and deposition at the toe of the Cascadia accretionary prism. We conducted a series of ALVIN dives in a region south of Astoria Canyon to examine the interrelationship of fluid flow and slope failure in...
Liquid chromatographic determination of chloramine-T and its primary degradation product, p-toluenesulfonamide, in water
V. K. Dawson, R. A. Davis
1997, Journal of AOAC International (80) 316-318
N-sodium-N-chloro-ρ-toiuenesulfonamide (chloramine-T) effectively controls bacterial gill disease (BGD) in cultured fishes. BGD, a common disease of hatchery-reared salmonids, causes more fish losses than any other disease among these species. This study describes a liquid chromatographic (LC) method that is capable of direct, simultaneous analysis of chloramine-T and its primary...
The genus Krithe (Ostracoda) from the Campanian and Maastrichtian (Upper Cretaceous) of the northern US Gulf Coastal Plain
T.M. Puckett
1997, Journal of Micropalaeontology (16) 145-157
The ostracode genus Krithe is one of the most common genera in the Upper Cretaceous (late Santonian to Maastrichtian) deposits of the northern Gulf Coastal Plain of North America. Although it is never abundant, the genus occurs in sediments that were deposited under a wide range of palaeoenvironments, including nearshore...
Protistan communities in aquifers: A review
G. Novarino, A. Warren, H. Butler, G. Lambourne, A. Boxshall, J. Bateman, N.E. Kinner, R.W. Harvey, R.A. Mosse, B. Teltsch
1997, FEMS Microbiology Reviews (20) 261-275
Eukaryotic microorganisms (protists) are a very important component of microbial communities inhabiting groundwater aquifers This is not unexpected when one considers that many protists feed heterotrophically, by means of either phagotrophy (bacterivory) or osmotrophy. Protistan numbers are usually low (<102 per g dw of aquifer material) in pristine, uncontaminated aquifers...
Complexities of plinian fall deposition at vent: An example from the 1912 Novarupta eruption (Alaska)
J. Fierstein, Bruce F. Houghton, C. J. N. Wilson, W. Hildreth
1997, Journal of Volcanology and Geothermal Research (76) 215-227
An extremely proximal ejecta ring, with exposures to within 100 m of vent, was deposited during later-stage plinian fall activity during the 1912 Novarupta eruption in Alaska. One bed in the ejecta ring (bed S) contains predominantly andesitic clasts which serve to delineate the striking contrast in thinning rates along...
Transient triggering of near and distant earthquakes
J. Gomberg, M.L. Blanpied, N.M. Beeler
1997, Bulletin of the Seismological Society of America (87) 294-309
We demonstrate qualitatively that frictional instability theory provides a context for understanding how earthquakes may be triggered by transient loads associated with seismic waves from near and distance earthquakes. We assume that earthquake triggering is a stick-slip process and test two hypotheses about the effect of transients on the timing...
Deep well injection of brine from Paradox Valley, Colorado: Potential major precipitation problems remediated by nanofiltration
Yousif K. Kharaka, Gil Ambats, James J. Thordsen, Roy A. Davis
1997, Water Resources Research (33) 1013-1020
Groundwater brine seepage into the Dolores River in Paradox Valley, Colorado, increases the dissolved solids load of the Colorado River annually by ∼2.0 × 108 kg. To abate this natural contamination, the Bureau of Reclamation plans to pump ∼3540 m3/d of brine from 12 shallow wells located along the Dolores River....
Effects of exchanged cation and layer charge on the sorption of water and EGME vapors on montmorillonite clays
Cary T. Chiou, David W. Rutherford
1997, Clays and Clay Minerals (45) 867-880
The effects of exchanged cation and layer charge on the sorption of water and ethylene glycol monoethyl ether (EGME) vapors on montmorillonite have been studied on SAz-1 and SWy-1 source clays, each exchanged respectively with Ca, Na, K, Cs and tetramethylammonium (TMA) cations. The corresponding lattice expansions were also determined,...
Comparative sensitivity of Selenastrum capricornutum and Lemna minor to sixteen herbicides
J.F. Fairchild, D. S. Ruessler, P.S. Haverland, A.R. Carlson
1997, Archives of Environmental Contamination and Toxicology (32) 353-357
Aquatic plant toxicity tests are frequently conducted in environmental risk assessments to determine the potential impacts of contaminants on primary producers. An examination of published plant toxicity data demonstrates that wide differences in sensitivity can occur across phylogenetic groups of plants. Yet relatively few studies have been conducted with the...
The Chesapeake Bay bolide impact: A convulsive event in Atlantic Coastal Plain evolution
C. Wylie Poag
1997, Sedimentary Geology (108) 45-90
Until recently, Cenozoic evolution of the Atlantic Coastal Plain has been viewed as a subcyclical continuum of deposition and erosion. Marine transgressions alternated with regressions on a slowly subsiding passive continental margin, their orderly succession modified mainly by isostatic adjustments, occasional Appalachian tectonism, and paleoclimatic change. This passive scenario was...
Effects of interaction between ultramafic tectonite and mafic magma on Nd-Pb-Sr isotopic systems in the Neoproterozoic Chaya Massif, Baikal-Muya ophiolite belt
Y. V. Amelin, E. Yu Ritsk, L.A. Neymark
1997, Earth and Planetary Science Letters (148) 299-316
Sm-Nd, Rb-Sr and U-Pb isotopic systems have been studied in minerals and whole rocks of harzburgites and mafic cumulates from the Chaya Massif, Baikal-Muya ophiolite belt, eastern Siberia, in order to determine the relationship between mantle ultramafic and crustal mafic sections. Geological relations in the Chaya Massif indicate that the...
Management of Sequoiadendron giganteum and Sequoia sempervirens forests in the reserves of California - Considerations of ecology and conservation
D.M. Graber
1997, Tropics (6) 429-434
Giant sequoia (Sequoiadendron giganteum), also known as “Bigtree” and “Sierra Redwood,” is entirely restricted to the Sierra Nevada mountain range in the State of California, while coast redwood (Sequoia sempervirens) is restricted to coastal northern California, extending northward slightly into the State of Oregon. Both charismatic species,...
Infiltration of atrazine and metabolites from a stream to an alluvial aquifer
P. J. Squillace, M. R. Burkart, W.W. Simpkins
1997, Journal of the American Water Resources Association (33) 89-95
ABSTRACT: The infiltration of atrazine, deethylatrazine, and deisopropylatrazine from Walnut Creek, a tributary stream, to the alluvial valley aquifer along the South Skunk River in central Iowa occurred where the stream transects the river's flood plain. A preliminary estimate indicated that the infiltration was significant...
Orbital forcing of deep-sea benthic species diversity
T. M. Cronin, M.E. Raymo
1997, Nature (385) 624-627
Explanations for the temporal and spatial patterns of species biodiversity focus on stability-time, disturbance-mosaic (biogenic microhabitat heterogeneity) and competition-predation (biotic interactions) hypotheses. The stability-time hypothesis holds that high species diversity in the deep sea and in the tropics reflects long-term climatic stability. But the influence of climate change on deep-sea...
Adsorbed natural gas storage with activated carbons made from Illinois coals and scrap tires
Jielun Sun, T.A. Brady, M.J. Rood, C.M. Lehmann, M. Rostam-Abadi, A.A. Lizzio
1997, Energy and Fuels (11) 316-322
Activated carbons for natural gas storage were produced from Illinois bituminous coals (IBC-102 and IBC-106) and scrap tires by physical activation with steam or CO2 and by chemical activation with KOH, H3PO4, or ZnCl2. The products were characterized for N2-BET area, micropore volume, bulk density, pore size...
Hydrologic indices for nontidal wetlands
Robert M. Lent, Peter K. Weiskel, Forest P. Lyford, David S. Armstrong
1997, Wetlands (17) 19-30
Two sets of hydrologic indices were developed to characterize the water-budget components of nontidal wetlands. The first set consisted of six water-budget indices for input and output variables, and the second set consisted of two hydrologic interaction indices derived from the water-budget indices. The indices then were applied to 19...
Primitive magmas at five Cascade volcanic fields: Melts from hot, heterogeneous sub-arc mantle
C. R. Bacon, P. E. Bruggman, R.L. Christiansen, M.A. Clynne, J.M. Donnelly-Nolan, W. Hildreth
1997, Canadian Mineralogist (35) 397-423
Major and trace element concentrations, including REE by isotope dilution, and Sr, Nd, Pb, and O isotope ratios have been determined for 38 mafic lavas from the Mount Adams, Crater Lake, Mount Shasta, Medicine Lake, and Lassen volcanic fields, in the Cascade arc, northwestern part of the United States. Many...
Testing alternative conceptual models of seawater intrusion in a coastal aquifer using computer simulation, southern California, USA
Tracy Nishikawa
1997, Hydrogeology Journal (5) 60-74
Two alternative conceptual models of the physical processes controlling seawater intrusion in a coastal basin in California, USA, were tested to identify a likely principal pathway for seawater intrusion. The conceptual models were tested by using a two-dimensional, finite-element groundwater flow and transport model. This pathway was identified by the...
