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Radiometric dating gives you an exact date of formation for a layer or a rock, even if you don t have another layer or rock to compare it with. If you know when the top or bottom layers were formed - you know just about when was the middle one dating in andover massachusetts..
short answer: the term relative dating is distinguished from absolute dating to make it clear that one does not get a specific estimate of the age of an object from relative dating, but one does get such an estimate of true age from absolute dating.
The age is based on the half-life of the isotopes (their rate of decay over time).
Short answer: both relative dating and absolute dating are tools used to give temporal characteristics to a sequence of events.
before radiometric dating (or other methods of absolute dating like counting tree rings) it was difficult to determine the actual age of an object.
The circumstances of the object may allow one to say that one object is older than another without being able to assign a particular age to the objects.
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Looking at how rock formations are structured, a geologist may be able to say which rock was developed in which layer in a particular order but not be able to determine that actual geologic age of the layers.
) whereas absolute poverty stays the same, and this could be problematic for absolute poverty, when comparing neighborhoods that differ, and when you compare cross-nationally one method or relative dating.
If you have 3 layers of rock, the one in the middle is younger than the bottom one and older than the top one.