BROADWAY MORAINE. 531 



hills. Toward the north it is flat, with gravel near the surface in some places. 

 Between Milford Center and Union ville "claj' knobs" and rolling land can he seen 

 north of Darby Creek, while toward the south and in Union Township the "Darby 

 plains" extend several miles. Wells at Pottersburg penetrate the drift over 60 feet 

 without meeting the rock, but obtain good water at that depth. About Newton 

 there is a ver}' rolling and blufl:y tract of land, some of the wells obtaining bitter 

 water in "blue clay" at 52 feet. This rolling strip of land dies out toward the south 

 and west and toward the north and east. Throughout the rest of the countj' the 

 surface is verj^ nearly flat, wells being less than 2.5 feet. This belt of clay knobs 

 crosses the entire county, though it seems to turn a little toward the north in Jerome 

 Township. * * * 



The drift ridge which separates Big Darby and Mill creeks has already been 

 alluded to under the head of "Surface features." Its exact form, limits, and loca- 

 tion, even within the county, have not been full}- made out. The time given to the 

 count}' would not allow a careful survej^ of this ridge in detail. It is well known to 

 the inhabitants of the county. It forms a belt of high and rolling clay land which 

 shows bowlders and gravel somewhat more abundantl_y than the surface of the rest 

 of the county. It is believed to be of the nature of a glacial moraine, and was 

 probabh' thrown down by the ice at a period when the retreating ice foot was nearly 

 stationar}' for a long time at about that place. It is ver}' similar to those other very 

 extended drift remains that cross northwestern Ohio, but is somewhat more clayey 

 than they. Its connection with them is not known, l)ut it was doubtless contempora- 

 neous in origin with one of them. 



BROADWAY MORAINE. 



This constitutes the second of the moraines of the Scioto lobe. It 

 crosses the Scioto River above Columbus, and receives its name from a 

 village in central Union County, which is situated on its northern slope. 



DISTRIBUTION. 



In Hardin and Logan counties this belt is combined with the Powell 

 moraine, as shown in PL XIII. It becomes a distinct belt near the head 

 of Mill Creek, a few miles west of Broadway, and passes slightly north of 

 east to the Scioto River, crossing that stream immediately west of Delaware. 

 East from this stream it is well defined for a few miles, but near the 

 Olentangy River it loses strength, and there are two feeble belts which 

 appear to form its continuation eastward. The outer one crosses the 

 Olentangy a short distance above Delaware, and passing south of Eden, 

 comes to Alum Creek at the bend east of that village, and then follows the 

 north side of the stream to its source, near Mount Gilead, where it becomes 

 merged with the Powell moraine. The inner member follows up the 



