Radiometric dating questions and answers

Paleozoic means ancient life, Mesozoic means middle life and Cenozoic refers to the time of recent life.

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All of these dating methods begin with some radioactive isotope such as U-238, U-235, Th-232, K-40, or Rb-87. These elements are naturally radioactive, that is, they spontaneously emit an alpha or a beta particle and, as a result, are transformed into some different element, called the “daughter” isotopes.

Each period represents a change in the plants and animals at that time 5.

What do the terms Paleozoic, Mesozoic and Cenozoic mean?

Errors are particularly bad with the K-Ar (potassium-argon) method. Joan Engels wrote: It is now well known that K-Ar ages obtained from different minerals in a single rock may be strikingly discordant.3 Skull 1470 In 1972 Richard Leakey found a skull, near Lake Rudolf in Kenya, that he said was “virtually indistinguishable” from that of a modern human.

Studies have been made of submarine basalt rocks of known recent age near Hawaii. Yet it was found beneath a layer of the volcanic KBS Tuff that had an accepted radiometric date of 2.6 MY (millions of years old).

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