280 
Section VII was obtained in the eastern part of cut 33, known as the 
“Head Cut.” The western part of the cut is Pennsylvanian, an uncon- 
formity occurring about half way through the cut and above the upper lime- 
stone, so that the limestone may have been thicker than now exposed. This 
limestone is undoubtedly to be correlated with that in cut 35 (see section 
VIII) on stratigraphic and lithologic relations as well as faunal evidence. 
The lower layers of the limestone in section VIII are brecciated and the 
limestones in both sections VII and VIII contain fragments of a sandstone 
similar to the underlying upper sandstone, while many species appear for 
the first time. The intervening cut, 34, contains sandstone, probably of 
Pennsylvanian age, and obscures the relations of cuts 33 and 35. 
From the foregoing it will be seen that there is an apparent uncon- 
formity between the upper sandstone and limestone, which may account 
for the peculiarities of section VI. 
The stratigraphic relation of the middle and upper sandstones and 
the middle limestones are easily determined, but there is some doubt as 
