Silurian Chain Coral: Halysites

Here is a another Halysites segment from the Silurian Period. The chain appearance is much more apparent in this specimen. It could use some more cleaning though.

The Horn Coral Siphonophrentis elongata

Besides finding Halysites in the Silurian layer I also come across segments of a species of horn coral that was huge. This is a smaller segment that measures about 7 cm in diameter. It is from the Devonian period and was called Siphonophrentis elongata (Rafenesque & Clifford, 1820).  Found in central Jefferson County, Louisville, Kentucky USA. This fossil is found in the Jeffersonville Limestone.

Halysites from the Silurian Period

Here is an index fossil for the Silurian Period called a Halysites

It was found in central Jefferson County in the state of Kentucky.