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2. Radiometric dating - Wikipedia

   en.wikipedia.org/wiki/Radiometric_dating

   Luminescence dating methods are not radiometric dating methods in that they do not rely on abundances of isotopes to calculate age. Instead, they are a consequence of background radiation on certain minerals. Over time, ionizing radiation is absorbed by mineral grains in sediments and archaeological materials such as quartz and potassium ...

3. Argon–argon dating - Wikipedia

   en.wikipedia.org/wiki/Argon–argon_dating

   Argon–argon (or 40 Ar/ 39 Ar) dating is a radiometric dating method invented to supersede potassium–argon (K/Ar) dating in accuracy. The older method required splitting samples into two for separate potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes.

4. Isochron dating - Wikipedia

   en.wikipedia.org/wiki/Isochron_dating

   An isochron diagram will only give a valid age if all samples are cogenetic, which means they have the same initial isotopic composition (that is, the rocks are from the same unit, the minerals are from the same rock, etc.), all samples have the same initial isotopic composition (at t 0), and the system has remained closed.

5. K–Ca dating - Wikipedia

   en.wikipedia.org/wiki/K–Ca_dating

   Potassium–calcium dating, abbreviated K–Ca dating, is a radiometric dating method used in geochronology. It is based upon measuring the ratio of a parent isotope of potassium (40 K) to a daughter isotope of calcium (40 Ca). [1] This form of radioactive decay is accomplished through beta decay. Calcium is common in many minerals, with 40

6. Radioactivity in the life sciences - Wikipedia

   en.wikipedia.org/wiki/Radioactivity_in_the_life...

   Its maximum specific activity is 0.0624 kCi/mol (2.31 TBq/mol). It is used in applications such as radiometric dating or drug tests. [6] Carbon-14 labeling is common in drug development to do ADME (absorption, distribution, metabolism and excretion) studies in animal models and in human toxicology and clinical trials. Since tritium exchange may ...

7. Rubidium–strontium dating - Wikipedia

   en.wikipedia.org/wiki/Rubidium–strontium_dating

   The rubidium–strontium dating method (Rb–Sr) is a radiometric dating technique, used by scientists to determine the age of rocks and minerals from their content of specific isotopes of rubidium (87 Rb) and strontium (87 Sr, 86 Sr). One of the two naturally occurring isotopes of rubidium, 87 Rb, decays to 87 Sr with a half-life of 49.23 ...

8. College Football Playoff ranking prediction: How the top 10 ...

   www.aol.com/college-football-playoff-ranking...

   The penultimate College Football Playoff rankings will be released Tuesday. Our projection of how the top 10 will look ahead of championship weekend.

9. Category:Radiometric dating - Wikipedia

   en.wikipedia.org/wiki/Category:Radiometric_dating

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