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For allegedly older samples K-Ar is used to "date" the standard and as such it still has the same problems as K-Ar dating.This lesson introduces absolute dating and a few ways in which scientists accomplish it.Some rocks dated older than the 4.5 billion year evolutionary age for Earth. Isochron dating can also produce negative ages, by producing a negative slope.
Some times radiometric dating produces impossible results.
Evidence for Isotopic Fractionation does show up in isotopic data so it is a factor that needs to be considered.
Water flow through rocks is important because all parent substances and many daughter substances are water soluble.
PART 1: Back to Basics PART 2: Problems with the Assumptions PART 3: Making Sense of the Patterns This three-part series will help you properly understand radiometric dating, the assumptions that lead to inaccurate dates, and the clues about what really happened in the past.
Most people think that radioactive dating has proven the earth is billions of years old.