What is a type of relative dating of fossils dating a recently widowed woman

Suppose you find a fossil at one place that cannot be dated using absolute methods.That fossil species may have been dated somewhere else, so you can match them and say that your fossil has a similar age.Some rock layers are surrounded by volcanic debris, or tuff, in situ, meaning they weren't broken by igneous intrusions; rather, local volcanic activity simply blanketed an area with ash at various times.

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This matching process is called correlation, which has been an important process in constructing geological timescales.

According to the law of superposition, as long as an area remains undeformed by outside forces, the deeper you go down through the layers of rock, the older they are.

So, if you know the ages of the layers in the parent and wall rocks, you can calculate the age of the layers in your subsided area or xenolith by matching them.

Different species of ammonites lived at different times within the Mesozoic, so identifying a fossil species can help narrow down when a rock was formed.

Correlation can involve matching an undated rock with a dated one at another location.

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