problems with uranium lead dating
The rest of the mixing comes from source 3. There are at least some outstanding anomalies. It can be used to date rocks that formed and crystallised from about 1 million years to over 4. As we have seen, we cannot ignore geochemical effects while we consider geophysical effects. The trapped charge accumulates over time at a rate determined by the amount of background radiation at the location where the sample was buried. You calculate that the hose must have been running for 30 hours. As the plume rises it melts and incorporates other crustal rocks.
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