BROADWAY MORAINE. 533 



40 feet high, while immediately west is the Scioto Marsh, which over an 

 area of several square miles is level as a floor. In other directions the 

 greater part of the surface is nearly level, only low swells 10 to 15 feet 

 high being present. Following the divide eastward few knolls exceeding 

 1 5 feet in lieight are found, but nearly all of the surface is gently undulatory. 

 North of Silver Creek station the surface is rather elevated, standing about 

 100 feet above Silver Creek, which ^^asses just east of it, and reaching 

 probably 1,175 feet above tide. From the elevated part the descent is 

 gradual in all directions. On this slope the morainic swells are low. At 

 Taylor Creek, a tributary of the Scioto east of Silver Creek, is an esker 

 ridge, and the moraine here swings abruptly southward, there being all 

 along the west side of the esker morainic topography with numerous swells 

 10 to 15 feet in height, while east of it for several miles the surface is 

 nearly level. At the south end of the esker the moraine contains a few 

 gravel knolls 30 feet or more in height, but for some miles southward only 

 low swells of till occur. In the tract southwest of the esker toward Belle 

 Center, several basins were noted, a somewhat rare feature on this moraine. 

 They vary in size from a fraction of an acre up to several acres each, and 

 the centers are depressed several feet below the rims, their borders being in 

 some cases abrupt, like the bank of a lake. They are still marshy and 

 may once have contained lakes. 



The moraine in its southward course from the Taylor Creek esker 

 passes through Big Springs and West Mansfield. Its knolls are 8 or 10 feet 

 high, and the relief above the outer border plain ranges from 10 to 40 feet; 

 at West Mansfield it is about 35 feet. The Broadway moraine becomes 

 distinct from the Powell near West Mansfield. From West Mansfield 

 eastward it is usually characterized by low swells, seldom over 10 feet in 

 height, but having a well-defined ridge as a basement for the knolls. South 

 and southeast of Broadway the knolls are 10 to 15 feet or more high, and 

 some of them are quite sharp. This topography continues to the Scioto 

 River, though between Ostrander and the Scioto the crest of the ridge is 

 smooth, while the slopes carry the usual swells. No morainic knolls were 

 observed in the A^alley of the Scioto where this moraine crosses, but, as is 

 shown later, a belt of gravelly knolls follows the border of the valley from 

 Prospect southward nearly to the moraine, having a trend probably in line 

 with the ice movement. On the east side of the river, west of Delaware, 



