OUTLINE OF MONOGRAPH. " 27 



dikes that are younger than the gabbro and that cut the acid dikes, which themselves 

 cut the gabbro. 



Chapter VII. In this chapter the drift is briefly described, the general distribu- 

 tion of the Vermilion moraine is outlined, and the locations of certain glacial lakes 

 are stated. 



Chapter VIII. This chapter consists of a brief discussion of the topography of the 

 district in its relation to the geologic structure. 



Chapter IX. This chapter is devoted to a discussion of the general geologic 

 historjr of the district as determined bj' the various facts set forth in previous 

 chapters. 



