664 GEOLOGY OF OHIO. 
Lebanon division of the Cincinnati series underlie the western half of 
Greene county. This area comprises the more eroded portions of the 
county, as has been already stated, and, lying at a low level, is so heavily 
covered with the deposits of the modified Drift that the rocks are, for the 
most part, concealed. There are, however, numerous exposures of the 
series, especially in Spring Valley and Sugar Creek townships, in which 
all of its characteristics, both.as to order of stratification and fossil con- 
tents, can be seen and studied to excellent advantage. One hundred 
feet are shown in the valley of Bear Branch, a small tributary of the 
Little Miami, which enters the valley opposite Claysville. There is no 
point in the State where finer specimens of some of the common fossils 
of the formation have been found than here. Among them may be 
named Ambonychia radiata, Orthis sinuata, Leptaena sericea, Rhynchonella 
capax, Isotelus megistos. Representatives of at least thirty species of fos- 
sils can be obtained from the section here shown. 
The line.of junction between the Lower and Upper Silurian forma- 
tions is shown as distinctly in Greene county as in any section of the 
State. One of the favorable points for studying it has already been 
named, but others almost equally satisfactory are furnished in the neigh- 
borhoods of Franklin Berryhill and Thomas J. Brown, of Spring Valley 
township, on Ceesar’s Creek where it is crossed by the Wilmington and 
Xenia Turnpike, and in the vicinity of Reed’s Hill, in Bath township. 
As elsewhere in south-western Ohio, this horizon is marked by copious 
springs, to which attention will be more particularly called in the sub- 
sequent pages of this report. 
The same general order of facts described as occurring in the section 
at Goe’s Station will be found at each of the localities here named. 
The Cincinnati series in Greene county furnishes a small amount of 
building stone of fair quality, and this is, at present, its only economical 
application. i 
2. The Clinton limestone comes next in order, and its exposures in 
Greene county leave nothing to be desired. The fine displays of it along 
the Little Miami valley, from Goe’s Station to Yellow Springs, have 
already been noted. In addition to the section near Mr. Goe’s residence, 
the stratum can be seen to excellent advantage on the farms of Mrs. Bell, 
Messrs. J. H. Little, F. Grinnell, A. V. Sizer, and Wm. C. Neff, and in the 
cuttings for the Grinnell pike at the Little Miami bridge, and near the 
house of Dunmore McGwin. In Xenia township it is well shown in the 
banks of Oldtown Run and Massie’s Creek, and also near the head springs 
of Ludlow Creek, on the farrns of James Collins and others. In Bath 
township, however, there are miles of outcrops in which the whole forma- | 
