Paleomagnetic dating accuracy who is david warner dating


28-Oct-2020 20:57

Despite this limitation, paleoanthropologists have found dating by association with polar reversals to be a helpful additional method of tracking the evolution of our fossil ancestors in regions such as East Africa where there has been frequent volcanic activity leaving clear thermoremnant magnetic evidence.

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The time between reversals has ranged between less than 100,000 to tens of millions of years with an average of about 300,000 years. It takes 1,000-8,000 years for one to be completed. It is thought that as a reversal approaches, the earth's magnetic field weakens.By comparing these data, a researcher can determine the direction of magnetic north at the last time the sample had been exposed to a high temperature..