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Creator:: Sinton, Christopher W. and Duncan, Robert A.
Abstract:: ⁴⁰Ar-³⁹Ar incremental heating experiments were performed on volcanic rocks recovered by drilling during Ocean Drilling Program Leg 152, southeast Greenland Margin (63°N), and Deep Sea Drilling Project Leg 81, southwest Rockall Plateau (56°N). Both of these legs drilled into thick sections of submerged lava flows, known as seaward-dipping reflector sequences,...
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Full Text:: 811 Christopher W. Sinton2,3 and Robert A. Duncan2 ABSTRACT 40Ar-39Ar incremental heating

Creator:: Sinton, Christopher W., Christie, David M., and Duncan, Robert A.
Abstract:: Lavas from seamounts of the central Galápagos Platform and the Carnegie Ridge increase in age with distance from the western edge of the platform, consistent with a hotspot model for the generation of these features. The areal distribution of seamount ages suggests that the pattern of dispersed volcanism seen on...
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Full Text:: seamounts Christopher W. Sinton, David M. Christie, and Robert A. Duncan College of Oceanic and

Creator:: Sinton, Christopher W., Duncan, Robert A., and Denyer, Percy
Abstract:: The pre-Tertiary oceanic crust exposed on the west coast of Costa Pica has been broadly referred to as the Nicoya Complex. This study was designed to determine the age of the Nicoya Complex in the Nicoya Peninsula, Playa Jaco, and the Quepos Peninsula using Ar-40-Ar-39 radiometric dating and to assess...
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Full Text:: W. Sinton 1 and Robert A. Duncan College of Oceanic and Atmospheric Sciences, Oregon State

Creator:: Sinton, C. W., Hitchen, K., and Duncan, Robert A.
Abstract:: At the submerged margins of the North Atlantic, andesitic to dacitic and basaltic volcanic rocks occur together. The silicic rocks were derived by processes requiring the presence of continental crust (crustal anatexis and/or contamination of mafic magmas) while the majority of the basaltic lavas had little or no contact with...
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Full Text:: . W. SINTON*†, K. HITCHEN‡ & R. A. DUNCAN* * College of Oceanic and Atmospheric Sciences, Oregon

Creator:: Detrick, R. S., Sinton, J. M., Ito, G., Canales, J. P., Behn, M., Blacic, T., Cushman, B., Dixon, J. E., Graham, David W., and Mahoney, J. J.
Abstract:: As the Galápagos hot spot is approached from the west along the Galápagos Spreading Center there are systematic increases in crustal thickness and in the K/Ti, Nb/Zr, ³He/⁴He, H₂O, and Na₂O content of lavas recovered from the spreading axis. These increases correlate with progressive transitions from rift valley to axial...
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Full Text:: GSC between 83�W and 101�W [Schilling et al., 1976, 1982] and near 95�W [Christie and Sinton, 1981

Creator:: Swanston, Christopher W. and Myrold, David Douglas
Abstract:: Nitrogen incorporation from red alder (Alnus rubra Bong.) into an Oregon upland mesic forest soil was studied by tracing the fate of 15N added as 15N-labeled alder leaf litter. The recovery of 15N in vegetation, litter, light- and heavy-fractions of the soil, the chloroform-labile (microbial biomass) pool, and the whole...
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Full Text:: plants and soil of a recent clearcut in Oregon1 Christopher W. Swanston and David D. Myrold Abstract

Creator:: Harmon, Mark E., Fasth, Becky, Woodall, Christopher W., and Sexton, Jay
Abstract:: The degree to which carbon concentration (CC) of woody detritus varies by tree taxa, stage of decay, tissue type (i.e., bark versus wood), and vertical orientation was examined in samples of 60 tree species from the Northern Hemisphere. The mean CC of 257 study samples was 49.3% with a range...
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Full Text:: Fasth a, Christopher W. Woodall b, Jay Sexton a aOregon State University, Department of Forest

Creator:: de Szoeke, Simon P., Fairall, Christopher W., Wolfe, Daniel E., Bariteau, Ludovic, and Zuidema, Paquita
Abstract:: A new dataset synthesizes in situ and remote sensing observations from research ships deployed to the southeastern tropical Pacific stratocumulus region for 7 years in boreal fall. Surface meteorology, turbulent and radiative fluxes, aerosols, cloud properties, and rawinsonde profiles were measured on nine ship transects along 20°S from 75° to...
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Full Text:: CHRISTOPHER W. FAIRALL AND DANIEL E. WOLFE National Oceanic and Atmospheric Administration/Earth System

Creator:: de Szoeke, Simon P., Edson, James B., Marion, June R., Fairall, Christopher W., and Bariteau, Ludovic
Abstract:: DYNAMO and TOGA-COARE observations and reanalysis-based surface flux products are used to test theories of atmosphere-ocean interaction that explain the Madden-Julian Oscillation (MJO). Negative intraseasonal outgoing longwave radiation, indicating deep convective clouds, is in phase with increased surface wind stress, decreased solar heating, and increased surface turbulent heat flux—mostly evaporation—from...
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Creator:: Benoit-Bird, Kelly J., Au, Whitlow W. L., and Kelley, Christopher D.
Abstract:: The target strengths and swimbladder morphology of six snapper species were investigated using broadband sonar, x rays, and swimbladder casts. Backscatter data were obtained using a frequency-modulated sweep ~60–200 kHz! and a broadband, dolphinlike click ~peak frequency 120 kHz! from live fish, mounted and rotated around each of their three...
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Full Text:: . Target strength and swimbladder characteristics Kelly J. Benoit-Bird and Whitlow W. L. Aua) Hawaii

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