Bores/burrows in (what?) from Louisana

[casadelshawn]

This just fell into my lap, but I'm having a hard time telling exactly what it is. Seems to have been burrowed in by clams? Worms? Somethingorother. Not my area of expertise, so I rely on y'all. Found in northwestern Natchitoches Parish, Louisiana. Sorry for the lack of scale, but I assure you, those are standard-sized human hands. First four photos are outside, last one is a straight-through cut. 

 

Any ideas? Appreciate the help as always!

[Tidgy's Dad]

That is incredibly beautiful and interesting. 

Simply gorgeous. 

Yes, it seems to be a mass of burrow ichnofossils, some infilled by different coloured minerals.

Stunning. 

[Al Dente]

Nice piece. Looks like teredolites.

 

 

[Rockwood]

In petrified wood.

[abyssunder]

Very nice Teredolites isp. 

[Denis Arcand]

Turn out that the straight-through cut was a very good idea.

 

Very interesting and colorful.

[casadelshawn]

4 minutes ago, Denis Arcand said:

Turn out that the straight-through cut was a very good idea.

There was some trepidation about that. Super glad someone who knew what they were doing cut it!

 

Thanks for the help, all. Truly appreciate'cha!