Coral Diversity

Here is a composite rock made up coral fragments. It is Devonian judging by where it was found in Louisville, Kentucky and the rock color.

Unknown Horn Corals Found in Louisville Kentucky

Here is a grayish rock found in Louisville Kentucky that is possibly Louisville Limestone. What find appealing to the largest of the horn corals in the rock are the layers (growth?) that appear along the horn. Not sure if these are Devonian or Silurian. The matrix they are in contains a number of crinoid stem pieces and maybe a spine or two.

Maybe Siphonophrentis or Aulacophyllum Horn Coral

Here is a Devonian horn coral found in Louisville, Kentucky.

UPDATE (January 2021): More than likely this is a Aulacophyllum horn coral fossil.