Zobrazeno 1 - 10
of 40
pro vyhledávání: '"R. Poreda"'
Autor:
R. B. Firestone, A. West, J. P. Kennett, L. Becker, T. E. Bunch, Z. S. Revay, P. H. Schultz, T. Belgya, D. J. Kennett, J. M. Erlandson, O. J. Dickenson, A. C. Goodyear, R. S. Harris, G. A. Howard, J. B. Kloosterman, P. Lechler, P. A. Mayewski, J. Montgomery, R. Poreda, T. Darrah, S. S. Que Hee, A. R. Smith, A. Stich, W. Topping, J. H. Wittke, W. S. Wolbach
Publikováno v:
Proceedings of the National Academy of Sciences. 104:16016-16021
A carbon-rich black layer, dating to ≈12.9 ka, has been previously identified at ≈50 Clovis-age sites across North America and appears contemporaneous with the abrupt onset of Younger Dryas (YD) cooling. The in situ bones of extinct Pleistocene m
Publikováno v:
The Journal of emergency medicine. 45(2)
Background Cellulitis, a frequently encountered complaint in the Emergency Department, is typically managed with antibiotics. There is some debate as to whether obtaining blood cultures and knowing their results would change the management of celluli
Publikováno v:
Bulletin of Volcanology; Mar2009, Vol. 71 Issue 2, p171-183, 13p
Publikováno v:
Bulletin of Volcanology; Jun2007, Vol. 69 Issue 7, p785-795, 11p
Autor:
James H. Natland, Sherman H. Bloomer, Robert L. Fisher, A. N. Baxter, William M. White, R. Poreda, John J. Mahoney
Publikováno v:
Journal of Geophysical Research: Solid Earth. 94:4033-4052
Basalt glasses from the Central Indian Ridge are distinct isotopically from mid-ocean ridge basalts (MORB) of the Indian Ocean triple junction and western few hundred kilometers of the Southeast Indian Ridge. In particular, very low 206Pb/204Pb and h
Publikováno v:
Journal of Volcanology and Geothermal Research. 34:201-209
Systematic trends in helium isotope ratios and gas compositions in Long Valley caldera hot-spring and fumarole gases reflect subsurface processes and conditions in the hydrothermal system. High 3 He 4 He ratios (to 6.5 × atmospheric) indicate a magm
Publikováno v:
Geophysical Research Letters. 5:897-900
Helium isotope ratios (³He/4He) in Lassen Park and Yellowstone Park volcanic gases show large ³He enrichments relative to atmospheric and crustal helium indicating the presence of a dominant mantle-helium component. The ratios in Lassen helium are
Publikováno v:
Geothermics. 8:241-244
Seven producing wells and seven hot springs in the Cerro Prieto geothermal field were sampled during April and September 1977, for determination of gas chemistry and helium isotope ratios. Well gases are remarkably uniform in gas chemistry and helium