95 



The pliysiograpliic liistory of the region iiiny be briefly smuiiinrized as 

 follows; When the Pleistocene peneplain had been developed the general 

 level of the land was but slightly above the present level of the bottom 

 lands of the larger streams. Th-^ streams flowed at about the level of the 

 present larger streams, wliile the divides between them looked much as 

 they do at v)resent wlien ^•ie^^•ed from the old peneplain west of Blooming- 



Fig. 14. The :Mitclu'll peneplain", about 41 miles west of Bloomins'ton. A part 

 of the Indian Cveelv l)asiu. The plain is here 100 feet above drainage level. Entire 

 drainage subterranean. 



ton. Tlie valleys of even tlie small streams were wide and their bluffs in- 

 distinct. TiU' landsci]it was wanting in angularity and was (ine character- 

 ized by gently flowing rurves. All tlie streams seem to liave meandered 

 oonsidera])ly ni»(,n llieii' Aalley floors, tlie lai'ger ones to a very great ex- 

 tent. :Most of tliese realurcs ar" well shuwii by tlie lilllc slre;;ms in wliidi 



■■'rill' Sink-lKilc plain ol' Ncwsoni. Iv is rajlcil Ibe Milclidl p.'Ueplain since the 

 edunlry nx-k is tli.' .Miiclicll limestone and it is lypically developed at ^Slitebell, 

 I lid., and southward. 



