Topics: Radiometric Dating - American Scientific Affiliation
Appendix: Common Misconceptions Regarding Radiometric Dating Techniques
Resources on the Web
Further Reading: Books
More About the Author
Figure 5. The original amount of the daughter strontium-87 can be precisely determined from the present-day composition by extending the line through the data points back to rubidium-87 = 0. This works because if there were no rubidium-87 in the sample, the strontium composition would not change. The slope of the line is used to determine the age of the sample.
Virtual Dating--a very helpful educational course on half-lives and radioactive decay was put together by Gary Novak at California State University in Los Angeles. This site has several interactive web workbooks to help the reader understand various concepts involved with radiometricdating.