Preface 



The principal reasons for the preparation of this study 

 are: (1) to present a thoro review of the work which has 

 been done by both American and foreign investigators on 

 the study of stylolites; (2) to present for the first time a 

 detailed discussion of the stylolites of the Indiana limestones, 

 especially those found in the well-known commercial stone, 

 the Salem limestone (known by the trade name, Bedford, or 

 Indiana Oolitic limestone) ; (3) to present evidence which 

 conclusively establishes the origin of stylolites. 



The writer wishes to express his obligations and thanks to 

 the following persons: Professor E. R. Cumings, of the De- 

 partment of Geology, Indiana University; Professor H. F. 

 Cleland, of the Department of Geology, Williams College; 

 Professors Clyde A. Malott and W. N. Logan, of the Depart- 

 ment of Geology, Indiana University ; and Professor J. Ernest 

 Carman, of the Department of Geology, Ohio State University. 



(6; 



