NatureSir Norman Lockyer Macmillan Journals Limited, 2007 |
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... 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 ...
Página 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 ...
Página 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 ...
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Immunology | 35 |
Preclinical research studies | 113 |
An essential resource for immunology researchers | 374 |
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