Rapp beach

[Rowboater]

Among other stuff (not many shark teeth) found a few puzzling pieces.  Picked up what I though was a piece of turtle shell, but now think it might be a broken geode with black crystals?  The second could also be a rock, it is solid too, but has roughly parallel columns, a few trucated, a few lost.  Any ideas?  (sorry for the scanner photos, not as flat as small teeth)

 

[abyssunder]

1 hour ago, Rowboater said:

The second could also be a rock, it is solid too, but has roughly parallel columns, a few trucated, a few lost.

This one looks like a tabulate coral fragment.

 

picture from here

 

[Rowboater]

Thanks Abyssunder, 

 

It does look very similar to your picture and photos on Google images.  Says these are very old, most of the stuff I find, at least shark teeth from the fresh water creek site i usually hunt, is from the Miocene, although I guess in the Rappahannock River just need an outcrop with fossils upstream from Ordovician (?) to wash down to  a beach . ahttp://paleoportal.org/kiosk/sample_site/state_45_period_15.html. 

 

Not a great specimen compared to most on the Net, but I've never seen another.