320 GEOLOGY OF OHIO. 



Limestone, about 1 foot. 



Blue clay, rather coarse 9 feet. 



Total depth 103 " 



(Rock not entered again.) 



Wells in the southeast part of Tully are eighteen to twenty feet. At 

 Van Wert natural springs occur along the south side of the ridge, This 

 is the first exception known to the observed location of such springs in 

 the "Spring Row," as in other counties, which is on the north side of 

 the ridge. There are some others at Van Wert on the north side also. 

 On Mr. E. R. Wells's farm, four miles west of Van Wert, is red soil, 

 charged with protoxide of iron, and other evidences of extinct springs, 

 on the north slope of the ridge. In all deep wells (i. e., those that pass 

 through the blue clay) at Van Wert, the water rises nearly or quite to 

 the surface, and considerable effort has been put forth to secure such 

 constant flow at various places in the city, although the shallow wells 

 are unfailing and easily obtained. 



Diagram showing Position of Artesian "Wells at Van Wert, with respect to the 



Van Wert Ridge. 





n" 



These artesian wells which rise from the water-bearing gravel below 

 the Drift clay, together with others in different parts of the county, prove 

 the Drift to be about 40 feet thick in Van Wert county. 



The Van Wert ridge is sometimes double. Such an instance may be 

 seen north from Streughn. The first one lies within half a mile of that 

 village, but the principal ridge road is half a mile further north, located 

 on the second ridge. Both rise abruptly from the adjoining fiat land, 

 having descent in both directions. They seem to be perfectly identical 

 in form and composition, although the former can only be traced two or 

 three miles toward the west, when, turning a little more to the south, it 

 slowly sinks away and disappears in the general Drift. A similar gravel 



