I found several mixed pieces last weekend while out in southwest Virginia; bits that had tumbled down the hillside and into the road. This was along a road that follows the Holston River, in mostly limestone/shale. One piece was filled with crinoids (stems), from tiny to pencil diameter; one had meshy bryozoan pieces and brachiopods, then there was the piece that had this. Please bear with me, I've looked online, and in my books, but since I have no idea what I'm looking for, it complicates things, and I want to learn. In both examples, the coral-looking chamber/pore sections are alongside the mesh/bryozoan-looking sections, so I'm not even sure if I'm looking for one, or two separate, organisms. I'm sure whatever it is, it's probably very common in this area, but if someone could help ID it so I'll know next time, or at least point me in the direction of what I need to research, I'd be grateful. Thank you!