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The method NOT used to correlate rock layers in two distant locations is **radioactive decay**.
1. **Strata sequences** are used to match rock layers based on their order and relative position within a sequence of layers. This helps geologists determine the age of rocks in different locations.
2. **Index fossils** are specific fossils that are used to identify a particular time period. By comparing the presence of these fossils in rock layers from different locations, scientists can correlate the ages of the rocks.
3. **Key beds** are distinctive rock layers that can be easily identified and correlated between distant locations. These layers serve as markers to help link different rock formations.
On the other hand, **radioactive decay** is a method used in radiometric dating to determine the absolute age of rocks by measuring the decay of radioactive isotopes. While this is a powerful tool for dating rocks, it is not typically used to directly correlate rock layers in distant locations.
I hope this helps clarify the method that is NOT used to correlate rock layers in different locations. If you have any more questions or need further assistance, feel free to ask!
