Geologists have used this method to date rocks as much as 4 billion years old. Lunisolar Solar Lunar Astronomical year numbering. A few examples of wild dates by radiometric dating: Dendrochronology 8. They are, obviously, assuming the amount of carbon in the atmosphere has always been constant, and its rate of decay has always been constant. Since sunlight causes the formation of C in the atmosphere, and normal radioactive decay takes it out, there must be a point where the formation rate and the decay rate equalizes. For this reason, many archaeologists prefer to use samples from short-lived plants for radiocarbon dating.
Edit Mode. Geology Earth sciences Geology. The volcanic event resets the amount of argon A Review". Potassium-argon dating From Conservapedia. Science Biology History of life on Earth Radiometric dating.