Siphonophrentis elongata Horn Coral

Here is a large Devonian horn coral that was found in central Jefferson County, Kentucky. This is just a small piece of one but they could grow to 60-80 cm in length. It came from Jeffersonville Limestone and existed in the Middle Devonian Period. It is called Siphonophrentis elongata (Rafenesque & Clifford, 1820).

Ordovician Colonial Coral

Here is a colonial coral found in eastern Jefferson County, Kentucky. The chambers are shown as the coral grew outward stacking chamber upon chamber. The top surface in shadow looks like a cratered asteroid where the little coral creatures once resided.

Devonian Corals

Here is a Devonian rock that has coral and horn coral (?). The horn coral(?) is on the top that appears to be eroding. A branching bryozoan is on the bottom. The rock is somewhat fragile and must be some sort of limestone since that is the Devonian layer.