Cretaceous cylinders from OK

[BobWill]

I found this rock with these cylindrical shapes in Little Glasses Creek north of Kingston Oklahoma. At first I thought it looked like a tabulate coral but since it is a Cretaceous site it must be something else. It may be geologic in origin but if so I would still like to know what it's called. The portion of the rock showing in the photo is about 140mm long and the tubes/cylinders are about 30mm long. Some are rounded on the end and others broken off square.

 

[Rockwood]

Casts of teredo borings in a mold of a piece of wood ?

[Al Dente]

1 hour ago, Rockwood said:

Casts of teredo borings in a mold of a piece of wood ?

That is what I think it is.

[DPS Ammonite]

Bob, what formation is this from? I remember finding some great Teredolites pieces form the Paw Paw in southern Oklahoma.

 

 

[Uncle Siphuncle]

I think that site may be Duck Creek fm.

[ynot]

Looks like a stalactitic agate to Me. Mineral not fossil.

 

You often see this type of formation in the coral geodes of Florida and Georgia.

[BobWill]

Thanks for all the replies. Being unfamiliar with the borings I have to ask a few questions about them. Is it normal for them to appear in sedimentery limestone with nothing that has a wood-look to it otherwise? It also seems odd that something would bore so close to other borings that they are all touching with little to no space in between. There is also a wide variety of sizes ranging from 1mm to 11mm in diameter. Some even have a slight taper outward towards the end that is sometimes rounded off. Would these features be more likely on a stalactite?

 

[Rockwood]

Spacing and size is all over the board, as observed in my collection of modern pieces.

[abyssunder]

8 hours ago, BobWill said:

Would these features be more likely on a stalactite?

In my opinion, not. The features resemble crystallized borings. According to the substrate they may be pholad borings (lithic) or teredo (xylic) borings. It's hard to make the distinguishing between them in some circumstances.

[BobWill]

Sorry to bring this one back but I posted a close-up on Fb and forgot to add it here.This wood grain-looking texture between the tubes appears to confirm  teredolites. Thanks all.

 

[Randyw]

Glad you got a confirmation/ identification!