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Relative dating method

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Relative dating

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Relative dating — Science Learning Hub

The most obvious feature of sedimentary rock is its layering. This feature is produced by changes in deposition over time. With this in mind geologist have long known that the deeper a sedimentary rock layer is the older it is, but how old? Although there might be some mineral differences due to the difference in source rock, most sedimentary rock deposited year after year look very similar to one another. This means that a quartz sandstone deposited million years ago will look very similar to a quartz sandstone deposited 50 years ago. Making this processes even more difficult is the fact that due to plate tectonics some rock layers have been uplifted into mountains and eroded while others have subsided to form basins and be buried by younger sediments. With out individual time stamps the process of dating these structures could become extremely difficult.
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Dating methods in Archaeology. Are they accurate?

Prachi Patkar Feb 15, Our planet Earth consists of numerous rocks and formations. Archeologists, geologists, and anthropologists primarily make use of relative dating techniques to understand the sequence of events, in order to establish the facts such as the time period of formation of planet Earth. Did You Know? Sir William Flinders Petrie, an Egyptologist, used the seriation technique of relative dating for dating the artifacts discovered at the graveyards near the Nile river in Egypt.
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This technique does not give specific ages to items. It only sequences the age of things or determines if something is older or younger than other things. Some types of relative dating techniques include climate chronology, dendrochronology, ice core sampling, stratigraphy, and seriation. Seriation uses the assumption that once a tool was developed, its use would become more widespread. Stratigraphy uses the assumption that higher layers or strata were laid down after lower layers.
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