A fossil can be used in finding the absolute age of rocks through a process called biostratigraphy. Biostratigraphy involves studying the distribution of fossils in rock layers to establish a relative age correlation between rock units. By comparing the fossil assemblages found in different rock layers or different locations, scientists can determine the relative order of sedimentary layers and the fossils they contain.
Once the relative age has been established, geologists can use other dating techniques, such as radiometric dating, to assign absolute ages to specific rock units or events. Radiometric dating relies on the decay of radioactive isotopes in rocks and minerals, providing a more precise measurement of the absolute age.
In summary, fossils are primarily used for relative dating and establishing the order of sedimentary layers, while radiometric dating provides the absolute ages of rocks and events within those layers.
Whon will a fossil be used in finding the absolute age of rocks?
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