Broad Branch is a tributary to Rock Creek.  Near its side is an abandoned quarry once run by the Pierce family.  Can you see the natural cracks in the rock that made this easier to quarry out the rock?

A close-up of the rock by the quarry shows the naturally occuring cracks.


 
 

Also at this location are some rocks of historical interest.  These pieces of granite were the first ever tested for age by radioactive decay.

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