HELPPPP ! .
posted by Amanda .
Describe how the principle of superposition was used in determining the relative ages of the crosssections?

Subject???? 
Ms. Sue
What on earth are you talking about?

HELPPPP ! . 
Amanda
EARTH SCIENCE ; NOBODY WANT TO HELP ME .

HELPPPP ! . 
Ms. Sue
We'd be glad to help you if we knew what you're asking.
Maybe this site has your answer.
http://en.wikipedia.org/wiki/Law_of_superposition
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