Origin of radiometric dating greensboro single woman for dating
In other words, the Sr-87/Sr-86 ratio there is the content the rock had before any rubidum decayed.The initial Rb-Sr ratio turns out to be very informative.Rocks derived directly from the mantle have ratios around 0.705 or less.The mantle is a lot poorer in Rb than Sr and its Sr-87 content increases slowly.So the two elements are not entirely chemically compatible.Nevertheless, rubidium does bond ionically, unlike argon.Far from being data, these dates are actually interpretations of the data.
Early attempts at Rubidium-Strontium dating made use of the fact that the Sr-87/Sr-86 ratio in rubidium-poor samples was about 0.7.
Rubidium is directly below potassium in the periodic table, while strontium is directly below calcium.
Rubidium has a 1 charge as a cation versus the 2 or strontium, and a larger ionic radius.
Most scientists and many Christians believe that the radiometric dating methods prove that the earth is 4.5 billion years old.
The textbooks speak of the radiometric dating techniques, and the dates themselves, as factual information.