26 W. H. HOBBS STILL RIVERS OF WESTERN CONNECTICUT 



shelf at Still River station, over which the Housatonic falls, is less satis- 

 factorily accounted for, although the formation of a Graben in the gneiss 

 in post-Newark time is the hypothesis which is favored by the present 

 writer in the explanation of the course of the Housatonic below this 

 point. Detailed study over a considerably larger area than that which 

 is here considered will be necessary before all the episodes in the history 

 of the Housatonic can be adequately recorded. 



