Colonial Rugose Coral?

[Sandfossil]

No known location as this is from a rock collection I acquired. Came across another bucket of what look like corals. Here is the largest in the bucket 10 1/2" × 6" × 7". If it is Id'd as a coral I will post the rest. I think they are 6 sided so maybe a Hexagonaria?

Thank you for looking.

[abyssunder]

I see tabulate corals.

[TqB]

It is a rugose coral but not Hexagonaria, the structure is wrong, especially in the outer part of each corallite. Yours has discontinuous septa, with the outer area broken up by large, bubbly dissepiments. (By the way, having six sided corallites is shared by most close-packed corals. It isn't a diagnostic feature.)

Possibly Acrocyathus, though there are others that look like this and it can be very difficult if you don't know the age.

 

 

 

Edited February 6, 2022 by TqB

[Sandfossil]

19 hours ago, TqB said:

It is a rugose coral but not Hexagonaria, the structure is wrong, especially in the outer part of each corallite. Yours has discontinuous septa, with the outer area broken up by large, bubbly dissepiments. (By the way, having six sided corallites is shared by most close-packed corals. It isn't a diagnostic feature.)

Possibly Acrocyathus, though there are others that look like this and it can be very difficult if you don't know the age.

 

 

 

This is the unfortunate part of my collection. After my husband died I bought a home with a collection of more than 30,000 rocks. The gentleman died about 12 years ago. I did not know him but all of his personal belongings were left behind with the home, hence his rock collection. He was a pilot who owned his own plane and flew to various states to collect material. I have found maps but there is no way I could pinpoint where each specific rock came from. He started collecting in the late 50's. 

 I didn't know that most corals were 6 sided so thanks for that. I do see what you are saying about the septa not extending all the way out to the wall leaving some voids. I think like in this photo I circled. Thank you again.

Cyndi

Edited February 7, 2022 by Sandfossil
Forgot to add pic.