Monday, July 6, 2009

Halysites louisvillensis Chain Coral Fossil

The index fossil of the Silurian period: Halysites. These coral fragments were found in the Louisville limestone in Jefferson County, Kentucky. Erwin Stumm's book Silurian and Devonian Corals of the Falls of the Ohio lists four types of Halysites and this one seems to be Halysites louisvillensis (Stumm, 1964).