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SOME SPECIAL PHYSIOGRAPHIC^ FEATURES OF THE KXOIi- 

 STONE CUESTA REGION OF SOUTHERN INDIANA: AN 

 EXAMPLE OF EXPLANATORY PHYSIOGRAPHY. 



By 



Clyde a. Malott 



INTRODUCTION AND STATEMENT OF PROBLEM 361 



DEFINITION OF GEOLOGIC STRUCTURE AND TOPOGRAPHIC 



CONDITION 302 



GEOLOGIC STRUCTURE OF THE KNOBSTONE CUESTA 



REGION 304 



General Stratigi-apliy 3()4 



Regional Dip '.H')') 



Areal Outcrop of Lithologic Units 30") 



TOPOGRAPHIC CONDITION OF THE KNOBSTONE CUESTA 



REGION 30() 



Factors luvoh'ed in Development of Topograhie Condition 300 



Influence of Lithology 307 



Influence of Physiographic Development 3()0 



THE PECULIAR ' GRADIENT OF BLUE RIVER 372 



A NOTABLE CASE OF STREA^I PIRACY 373 



The Development of Muddy Fork of Silver Creek by Piracy 373 



The Potential Future of Muddy Fork of Silver Creek 37!) 



Development of Special Bed-rock Terraces 380 



SUMMARY AND CONCLUSION 382 



SOME SPECIAL PHYSIOGRAPHIC FEATURES OF THE KNOBSTONE 



CUESTA REGION OF SOUTHERN INDIANA: AN EXAMPLE 



OF EXPLANATORY PHYSIO(iRAPHY. 



CLYDK A. M.VLOTT, 



( Indiana University. ) 



IXTRODVCTTOX AM) STATEMEST OF PROBLEM. 



Physiography is a study whicii deals largely with the develoitinent of land 

 forms. It attempts to explain th(> landscape by the action of certain pro- 

 cesses on earth materials under particular conditions, and is perhaps less 

 descriptive than it is explanatory. IMoltahly no other phase of physiography 

 presents so many problems as the results of the action of running water on 

 tiie many kinds of rwk material under various geologic and topographic 

 conditions. The intricacies of drainage d(>velopment and adjustment, traced 

 by means of toiiograi)hic forms, often iircsciit a histoi'v by no means simple. 



