How does Relative Dating for fossils work?

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Offline thedoc

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How does Relative Dating for fossils work?
« on: 13/07/2012 18:30:02 »
Natalie Lewis  asked the Naked Scientists:
   
How does Relative Dating for fossils work?

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« Last Edit: 13/07/2012 18:30:02 by _system »

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Offline Bill S

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Re: How does Relative Dating for fossils work?
« Reply #1 on: 15/07/2012 01:06:07 »

The law of superposition states that, unless a rock sequence has been inverted, younger beds will lie on top of older beds.  Fossils found as life assemblages in lower strata, but not in higher strata can thus be regarded as being relatively older than those fossils found exclusively in higher (and therefore younger) strata. 


Obviously, this says nothing about the absolute age of the fossils, but does give a relative timescale.

Does this answer your question, or were you looking for something more profound?