NatureSir Norman Lockyer Macmillan Journals Limited, 2007 - Science |
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Page 199
... samples that appear , on independent evidence ( visual , microscopic18 , X - ray diffraction and / or trace - element ana- lysis20,21 ) , to be well preserved , and samples that appear to be mod- erately altered by post - depositional ...
... samples that appear , on independent evidence ( visual , microscopic18 , X - ray diffraction and / or trace - element ana- lysis20,21 ) , to be well preserved , and samples that appear to be mod- erately altered by post - depositional ...
Page 200
... samples by filled diamonds ; and samples suspected of alteration by open circles . Error bars represent ± 1 s.e. on replicate analyses . one hand , we confirm that carefully selected fossils of this age are characterized by isotopic ...
... samples by filled diamonds ; and samples suspected of alteration by open circles . Error bars represent ± 1 s.e. on replicate analyses . one hand , we confirm that carefully selected fossils of this age are characterized by isotopic ...
Page 708
... samples if they reflect changes in the source reactions that occurred through Archaean time . The photolysis ... samples grouped at 33 33 Figure 3 | Plot of A36S versus 33S for mass - dependent and mass- independent data . a , Plot ...
... samples if they reflect changes in the source reactions that occurred through Archaean time . The photolysis ... samples grouped at 33 33 Figure 3 | Plot of A36S versus 33S for mass - dependent and mass- independent data . a , Plot ...
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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