Google up "Teredo wood." It's a worm/clam-eaten petrified wood found in several forms.
Along our coast, one can find chunks of modern wood similarly consumed today.
Lots of neat stuff showing up recently. Keep it up troops.
Our chert and limestone comes mostly from a 300ft thick layer of Ordovician limestone. Shallow warm seas.
That is a common rock pattern here, I want to lean toward oolitic limestone. Another guess fossiliferous limestone, duh. But anyway We do have and I have found a few tools and a point made with the hulls of Lithostrotion coral bedded within.
