LORRAIN SHALES, 
119 
43. 
From a Sketch by E. Emmons, Junior; showing the structure and appearance of the Lorrain Shales, at Lorrain, Jefferson county. 
7. Lorrain Shales. 
Lithological characters. — Condition as it regards fossils. — Gorges at Lorrain and 
Rodman, etc. 
In the Annual Reports, this mass has been designated, Pulaski Shales, a name which it 
would have been well to have retained, if it had embraced the whole series ; but at Pulaski 
only the upper part is visible ; while at Lorrain, the entire mass is exposed and cut through 
by the Sandy creek, from the grey sandstone to the Trenton limestone.. Lorrain is, therefore, 
a locality far more important than Pulaski; and hence, according to the modern practice of 
giving names to rocks, the former is to be preferred to the latter. 
The Lorrain shales, as they exist in Jefferson county, may be described as consisting of 
thin beds of grey sandstone, alternating with fine argillaceous slates of a greenish color. 
