Difference between relative and absolute dating methods

Absolute dating is the process of determining an age on a specified chronology in archaeology and geology.

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Figure 8.6a A xenolith of diorite incorporated into a basalt lava flow, Mauna Kea volcano, Hawaii.Recognizing unconformities is important for understanding time relationships in sedimentary sequences.An example of an unconformity is shown in Figure 8.8.The tilted rocks at the bottom are part of the Proterozoic Grand Canyon Group (aged 825 to 1,250 Ma).The flat-lying rocks at the top are Paleozoic (540 to 250 Ma).

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