382 GEOLOGY OF OHIO. 



Miami, at Caesar's Creek, to the same valley, north of Deerfield, shorten- 

 ing the distance between these two points by more than eight miles. 

 This is one of the lines by which Lebanon has sought railroad connec- 

 tions. 



On the east side of the Little Miami, the valleys of Csesar's Creek and 

 Todd's Fork are the only ones of considerable importance. Both streams 

 take their rise in the flat track of Greene and Clinton counties, from 

 which they descend to the Miami in a south-westerly course. 



The dividing ridge bttween the two Miamis, already referred to, holds 

 the highest land of the county, the altitude increasing towards the 

 northern boundary, where it reaches its maximum of about 625 feet 

 above low-water, at Cincinnati. The highest land measured in the county 

 is the summit of William Morris's hill, on the boundary-line between 

 Wayne and Clear Creek townships, one mile east of Utica. This has an 

 elevation above low- water at Cincinnati of 595 feet. The ridge in these 

 same townships, occupied by the Harlan, Tibbals, Stokes, and other 

 farms, has, certainly, sornewhat greater elevation. 



The lowest point of the county is found at its southern boundary, 

 on the Little Miami River. The railroad track, at this point, has an 

 elevation of only 150 feet above low-water at Cincinnati. The bed of the 

 stream at the point named is not more than 125 feet above the same base. 

 The vertical section of the county, then, embraces 500 feet. 



Geological Scale. — The geological scale of the county is identical in its 

 elements with that of Montgomery county, described in the first report 

 of the Survey, and with that of Clarke county, figured in the previous 

 volume. The 500 feet already given as making the vertical scale of the 

 county, are divided among the three formations there named in the fol- 

 lowing order, viz : 



FEBT. 



Niagara limestone 50 



Clinton limestone 16 



Cincinnati group 434 



Each of these formations will be characterized as it is exhibited in the 

 county. 



1. The Cincinnati Group. — The main divisions, previously established 

 in this group, will need to be recalled. This system of rocks, which has 

 an aggregate thickness of nearly eight hundred feet, is divided into three 

 divisions, viz: 



FEET. 



The Lebanon beds SJ63 



The Cincinnati beds, proper 450 



The Pt. Pleasant beds 50 



Warren county shows better than any other county in Ohio the upper- 



