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单词 radiometric dating
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Examples ofradiometric dating

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A temporal framework for pollen data is provided byradiometricdatingor a stratigraphic context for the pollen-bearing sediments.
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The pitfalls of not separating the finest and purest phases forradiometricdatingare emphasized: inherited material will give 'non-metamorphic' ages.
From theCambridge English Corpus
Schrire usesradiometricdatingmethods and other techniques to compartmentalize and talk about the past.
From theCambridge English Corpus
Further refinement of the formation's age usingradiometricdatingof sanidine crystals has resulted in an age of 34 million years old.
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Many geologists felt these new discoveries maderadiometricdatingso complicated as to be worthless.
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The advent ofradiometricdatingchanged the understanding of geologic time.
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Enough material has been recovered to facilitateradiometricdating, as well as identifying the peoples who once inhabited the site.
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Radiometricdatingranged mostly from 450,000 to 320,000 years ago, although several pieces strayed lower; this indicated a period of eruptive history at the time.
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He leaned towards the idea of old earth creationism but questionedradiometricdating.
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Such immobilised elements, in particular carbon, are valuable in that they permitradiometricdatingin reconstructing past vegetation patterns.
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The constant rates of decay in these decay series makes the comparison of the ratios of parent to daughter elements useful inradiometricdating.
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Radiometricdatinghas produced a range of estimates, dating various carvings to between 300 and 3000 years of age.
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The mass spectrometer was invented in the 1940s and began to be used inradiometricdatingin the 1950s.
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One example is that of dating objects, using observable evidence such as tree rings for dendrochronology or carbon-14 forradiometricdating.
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Radiometricdatingis also used to date archaeological materials, including ancient artifacts.
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It is these ash beds that allow preciseradiometricdatingas well.
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When used in concert withradiometricdating, it allows the resolution of timescales to a high degree of accuracy.
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After the discovery of radioactivity,radiometricdatingmethods were developed, starting in the 20th century.
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This technique is also widely used in the field ofradiometricdating, in which it is used to analyze relative abundance of different isotopes.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2024/12/28 9:11:56