Stroms still exist today in moderately deep water. Ordovician fossil stromatoporoids can be seen along roadcuts in the Blue Grass Region, especially near Lexington, where the white mounds contrast against the gray limestones. One Ordovician bryozoan fossil has numerous star-shaped patterns on its surface and is therefore called Constellaria . Massive bryozoan colonies like this one above are very commonly found in Ordovician limestones in the Blue Grass Region. This one had bump-like ornamentation called monticules.
Brachiopods are extremely abundant.
Some of the common forms, shown above, are Rafinesquina , Platystrophia , and Hebertella . Rafinesquina and Platystrophia are shells shown in the foreground in the Ordovician scene at the top of this page. One of the most abundant trilobite fossils is Flexicalymene meeki , shown above, is typically found in the rolled-up form. The burrow of this trilobite is at the top of the picture. A trilobite is being captured by a cephalopod in the Ordovician scene.