NatureSir Norman Lockyer Macmillan Journals Limited, 2007 - Science |
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Page 201
... isotope record ( which generally agree with each other , at least in timing of climate variations ) , and it is difficult to imagine that all time periods will be resolved in the same way as those examined in this study . For example ...
... isotope record ( which generally agree with each other , at least in timing of climate variations ) , and it is difficult to imagine that all time periods will be resolved in the same way as those examined in this study . For example ...
Page 202
... isotope composition of the mantle . A systematically declining distribution of mantle depletion ages would support the steady accumulation model . Peaks in the depletion ages that corresponded to the zircon crustal age peaks would ...
... isotope composition of the mantle . A systematically declining distribution of mantle depletion ages would support the steady accumulation model . Peaks in the depletion ages that corresponded to the zircon crustal age peaks would ...
Page 706
... isotope ratios in sedimentary rocks more than ~ 2.45 billion years ( 2.45 Gyr ) old and the disappearance of this signal in younger sediments is taken as one of the strongest lines of evidence for the transition from an anoxic to an ...
... isotope ratios in sedimentary rocks more than ~ 2.45 billion years ( 2.45 Gyr ) old and the disappearance of this signal in younger sediments is taken as one of the strongest lines of evidence for the transition from an anoxic to an ...
Contents
Crinan St London N19XW | 4 |
can China beat the odds and save the Siberian tiger? News Feature p 16 96 Polo inhibits progenitor selfrenewal and regulates Numb | 96 |
An asteroid breakup 160 Myr ago as the probable source of DN Forthal P WHIParren PA Marx | 29 |
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