[Rockhounds] Not your father's Mineral Collecting

[DonH]

Lawrence Rush wrote:
> 
> It didn't take long for local collectors to discover that mixed in with 
> the muck and mud of the dredgings, were very nice specimens of fluorite 
> and flint, which caused a bit of a "gold rush" to the park. 


The Dover flint appears in the Delaware River near Philadelphia as well. 
    Local historians are generally agreed that the material was ballast; 
however, Dover flint makes excellent flintlock strikers and knaps well 
too, so it was likely picked up and used by some folks at that time.

Best,
Don