Relative dating superposition

Simply stated, each bed in a sequence of sedimentary rocks (or layered volcanic rocks) is younger than the bed below it and older than the bed above it.This law follows two basic assumptions: (1) the beds were originally deposited near horizontal, and (2) the beds were not overturned after their deposition.



This is due to the fact that one or both of the objects may have been moved or redeposited into a different location.

The realization that sediments turn into rock was counter to the view that all rocks on Earth formed in a single creation event.


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