Zobrazeno 1 - 10
of 176
pro vyhledávání: '"KARL K. TUREKIAN"'
Autor:
Karl K. Turekian, J. Kirk Cochran
Publikováno v:
Annual Review of Marine Science. 4:1-10
Editors' Note Each year, the editorial board invites a distinguished member of the oceanographic community to contribute a prefatory chapter; this year, we were delighted when Karl Turekian, Sterling Professor of Geology and Geophysics at Yale, accep
Autor:
Karl K. Turekian, William A. Cobban, Kristal Kallenberg, Aaron J. Beck, Peter J. Harries, Neil H. Landman, David Weinreb, J. Kirk Cochran
Publikováno v:
American Journal of Science. 310:69-88
Evaluating the effects of diagenesis on the isotopic compositions of Sr, O, and C in marine carbonates is critical to their use as proxies in reconstructing information on the salinity, temperature and dissolved inorganic carbon of ancient oceans. We
Publikováno v:
American Journal of Science. 309:420-430
Two sections across the Frasnian-Famennian boundary were analyzed for Re and Os concentrations and 187Os/188Os ratios to evaluate evidence for a meteoritic input coincident with this boundary and its associated mass extinction. These sections are fro
Publikováno v:
Geochimica et Cosmochimica Acta. 71:4135-4140
The extent to which riverine Os is trapped in a temperate estuary was the aim of this study. The behavior of Os through the Hudson River, East River and the Long Island Sound (LIS) system is addressed using both natural Os and anthropogenically mobil
Autor:
Karl K. Turekian
Publikováno v:
Annual Review of Earth and Planetary Sciences. 34:1-35
I returned and saw under the sun, that the race is not to the swift, nor the battle to the strong, neither yet bread to the wise, nor yet riches to men of understanding, nor yet favour to men of skill; but time and chance happeneth to them all. Eccle
Publikováno v:
Proceedings of the National Academy of Sciences. 102:13023-13028
We show that the isotopic composition of oxygen (δ 18 O) in dissolved inorganic phosphate (P i ) reveals the balance between P i transport and biological turnover rates in marine ecosystems. Our δ 18 Op of P i (δ 18 Op) measurements herein indicat
Publikováno v:
Marine Geology. 217:255-265
To investigate the potential use of Li isotopes in foraminifera as a paleo-lithium seawater proxy, the Li isotopic compositions of planktic foraminifera (Orbulina universa, Globigerinoides sacculifer, Globorotalia menardii ,a ndGloborotalia truncatul
Autor:
Gwyneth A Williams, Karl K. Turekian
Publikováno v:
Earth and Planetary Science Letters. 228:379-389
The Pleistocene deposits of Santa Barbara Basin (SBB) show laminations during interglacial periods typical of an anoxic or suboxic depositional environment and more sporadically laminated deposits during glacial times, indicating a more oxic environm
Publikováno v:
GEOCHEMICAL JOURNAL. 38:651-660
Two soil profiles from the United States with radically different emplacement and climatic histories were analyzed for U, Th and members of the 238U decay series (234U, 230Th, 226Ra, 210Pb), 137Cs and osmium isotopes. The arid New Mexico profile is d