| 31. | They have isotope ratios that are said to be consistent with each other and inconsistent with the Earth.
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| 32. | The provenance of ocean sediments can be determined by analysing terrigenous strontium isotope ratios in deep ocean cores.
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| 33. | Bowen said the study analyzed carbon isotope ratios of soils found in sediments that contained the ancient fossils.
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| 34. | Finally, ages can also be determined from the U Pb system by analysis of Pb isotope ratios alone.
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| 35. | Likewise, most water comes from the magma rather than from precipitation, as indicated by the oxygen isotope ratios.
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| 36. | The isotope ratios of xenon are an important tool for studying the early history of the Solar System.
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| 37. | When these isotope ratios are measured by TIMS, mass-dependent fractionation occurs as species are emitted by the hot filament.
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| 38. | If so, the data about oxygen isotope ratios would be incomplete, especially for times when the extremities were coolest.
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| 39. | The isotope ratios for strontium and lead vary depending on the types of rock and soil in an area.
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| 40. | The raw material used has a higher oxygen isotope ratio than all other sources of white nephrite in East Asia.
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