GLACIAL DAMS. LAKES, AND WATERFALLS. 373 



istic knobs, ridges, and kettle-holes ; while to the south of it 

 there is an extensive plain known in the locality as the Beech 



Fig. 110.— Map of a portion of the glacial boundary in southern Ohio, showing its relation 

 to Paint Greek cut-off and to Beech Flats, at the head-waters of Ohio Brush Creek. 

 The general elevation of the unglaciated region is from three hundred to five hun- 

 dred feet above the river-bed. The terraced valley of the Scioto River is approxi- 

 mately indicated by the dotted line. The old valley of Paint Creek, now choked up 

 by srlacial debris, ran around by Slate Mills. The small >tream coming in at the angle 

 of the cut-off is the one from which an estimation of time is made in chapter xx. 

 page 561 . 



Flats. This. too. consists largely of transported material from 

 the north ; but it is mostly fine like loess, and level-topped, 

 and is about one hundred feet higher than the valley of 

 Baker's Fork, which heads in it and runs to the south, empty- 

 ing into the Ohio River. 



