STREAM VALLEYS AND THEIR MEANING 



473 



show no evidence of having been widened appreciably during the 

 time of their incision. The windings of the valley correspond with 



r 



- ^ 1. ,<i^iSt> 



Fig. 3.— Part of Lockport (Ky.) topographic sheet showing typical in-grown 

 meander valleys. Contour interval 20 feet. 



those of the stream. Lack of flats along the stream indicates that 

 incision is still in progress. 



