95 
The physicgraphic history of the region may be briefly summarized as 
follows: When the Pleistocene peneplain had been developed the genera! 
level of the land was but slightly above the present level of the bottom 
lands of the larger streams. The streams flowed at about the level of the 
present larger streams, while the divides between them looked much as 
they do at present when viewed from the old peneplain west of Blooming- 
Tig. 14. The Mitchell peneplain®, about 43 miles west of Bloomington. <A part 
of the Indian Creek basin. The plain is here 160 feet above drainage level. Entire 
drainage subterranean. 
ton. The valleys ot even the small streams were wide and their bluffs in- 
distinet. The landscape was wanting in angularity and was one character- 
ized by genily flowing curves. All the streams seem to have meandered 
considerably upon their valley floors, the larger ones to a very great ex- 
tent. Most of these features are well shown by the little streams in which 
®'The Sink-hole plain of Newsom. It is called the Mitchell peneplain since the 
country rock is the Mitchell limestone and it is typically developed at Mitchell, 
Ind., and southward, 
