12 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [Bull. 



rising to more or less accordant levels, lower on the southeast and 

 higher on the north and west. Much of the surface has been built 

 up above its pre-Pleistocene level by glacial deposits and lake or 

 swamp deposits and shows youthful features superimposed upon 

 the mature topography. Besides this the ancient erosion surface 

 that was elevated and dissected was far from smooth, and many 

 irregularities remained to form the high points in the present 

 erosion cycle. 



Mount Prospect, 1365 feet, northwest of the center of the area, 

 and Rabbit Hill, 1340 feet, along the western edge, are the highest 



Fig. I. — Index map .of Connecticut. Shaded portion shows area included 



in this report. 



elevations, while Mount Tom, Little Mount Tom, and Mount Rat, 

 a group of steep hills in the southwest corner, compose the most 

 rugged part of the region. The lowest point is also in the south- 

 west corner where the Shepaug River leaves the map area at an 

 elevation of 560 feet after receiving the Bantam River as a 

 tributary. 



Bantam Lake lies in a depression in the south central part of 

 the region. It is bounded on the northeast by a swamp and a 

 sand plain several square miles in extent, and on the southwest by 

 another swamp bordered by rolling, sandy hills. A number of 

 interesting discoveries relating to the pre-Pleistocene surface under 



