344 FRA NK B URSLE V TA YL OR 



amount of bowldery till rises upon the flank of the hill along the 

 east side, but the deposit is mainly a combination of kame and 

 delta. The Housatonic river has found a way around the west 

 side of the deposit. At the north end is a very tumultuous peb- 

 bly kame deposit, with pronounced knob-and-basin structure, 

 while to the south the undulations fade away upon a level grav- 

 elly surface which terminates in an abrupt bluff at something 

 more than a mile. The bluff has been made more steep by 

 recent erosion. Toward the south the terrace is composed of 

 stratified fine sand, except about fifteen feet at the top, which is 

 coarse gravel. Two or three kames rise as sharp cones forty 

 feet above the delta. One is shaped like a mesa, but narrows 

 into a short but well-developed esker at the north. This tongue 

 projected into Lake Housatonic, and it v/as in the water of this 

 glacial lake that the delta and kames were made. 



The Housatonic valley in this part is bounded on the east by 

 the plateau front and on the west by Lenox mountain. Five 

 miles north of Lenoxdale the plateau front turns to the east and 

 Lenox mountain comes to an abrupt end. The ice-tongue evi- 

 dently projected between these stolid sentinels. On the east 

 side there appear to be no prominent features marking the ice- 

 border. But on the west side the edge of the ice along the side 

 of the tongue is prettily marked by a small lake and by the 

 channel of its outlet, and in one place by morainic sediments. 

 Two miles and a half north of Lenox and west of the main road 

 there is a slight ridging up of the till into the form of a moraine. 

 To the west this originally extended across the expanded portion 

 of a ravine, coming out of Lenox mountain at the southwest. 

 When the ice stood here it held a small lake in the ravine, and 

 there are some small kames made by a stream which entered 

 this lake from the ice. Eastward and southward, passing three- 

 fourths of a mile east of Lenox, is a small but well defined old 

 river bed which holds its course along the eastward slope nearly 

 down to Laurel lake. Just east of Lenox it branches and takes 

 a lower route a quarter to half a mile farther east and runs about 

 parallel to the same destination. The two branches of the 

 channel represent two positions of the ice-front during this halt. 



