Volcano-like Fossil: Help

[aSubtleHero7CN]

Hello! I am new to this forum. I enjoy finding fossils, and I can positively identify I have found brachiopods before. In the same location, I often find these volcano-esque sort of fossils; but I have found no literature online or in book form that could delineate what type of fossil this is, etc. Pictured below is a rather extravagant example of the mystery fossil. Thank you, everyone, for looking and extending some help to a beginner!

[ynot]

These are horn corals.

Welcome to TFF!

[Rockwood]

Rugose coral. One of the more colonial forms though, I think.

I tend to think of horns as being more solitary.

[Fossildude19]

Welcome to the Forum.

 

I agree - imprints and steinkerns of Rugose, or Horn Corals. 

I also see a possible imprint of a bryozoan, (the net-like fossil) on the upper left of the rock.

Neat find.  

Regards,

[Darktooth]

Very nice find! Congratulations! Welcome to the forum!

[Rockwood]

Now I'm going to think volcano steinkern whenever I see one of these 

[aSubtleHero7CN]

Thank you, everyone, for the responses! I had no idea these were a type of coral. I do have another photo of a large piece of coral I found. I would very much so appreciate any tips/information on it as well! 

[Dylan]

Nice piece! Good find, happy hunting 

[jhw]

Not volcanic. Fossils don't fair well in lava! Nice find though.