Silurian and Devonian Corals

Here are some fossils I have found in the Devonian/Silurian period layer or Jeffersonville/Louisville limestone. These fossils were found in Jefferson County, Kentucky.



First is a cross section of a Stromatoporoid sponge.



This next fossil is a cross section of Siphonophrentis elongata horn coral. I normally find this in reddish-brown-white rock but this one is light gray. On the other side it still has texture of the horn coral surface preserved.

Here is a polyp jutting out of the surface of a Heliolites coral.

Here are some pipe organ corals. I have not found a piece this big before. I have been using a ruler I got at the Cincinnati GeoFair 2009 from Kent State University exhibit. It is quite handy.

I am not sure what this next plate is called. It could be Heliolites coraL.

Here is a hemispherical shaped coral that might be some sort of Heliolites.

Another coral I am not sure what it is called. It has some distinctive growth rings.

Here is a Favosites or honey comb coral.