The distribution of Fossil Corals in Franklin County is confined to the
Lower and Upper Silurian ages, and Devonian drift.
For variety in genera and species the large area of the Lower Silurian
presents an interesting field.
A few Upper Silurian representatives are found in the localities of
outcrops of that age.
Representatives from the Devonian drift form no inconsiderable part of the
Palæontology of the County.
The following list is far from exhaustive; but indicative of the extent
and variety of ancient Coral life within the bounds of the County; also of
progress so far made in the discovery and determination of genera and
species.
As Curator of Geology, and especially in the work of preparing this list,
I am indebted to other members of the Society for valuable aid.
The authorities exclusively depended upon for descriptions and
nomenclature are the Palæontology of Ohio, Vol. II; and the Indiana
Geological Reports of 1881-82.