320 L. Hatch — Marine Terraces in S.E. Connecticut. 



once that there is considerable level land and accordance of 

 hill tops at elevations which correspond over the whole area. 

 These elevations are, beginning at the highest : 



5. 480-520 feet elevation, which mav be called the 500-foot level. 



4. 380-420 " " '' "" *' " " 400 " " 



3. 300-340 " " " " " " ''' 300 " " 



2. 180-220 *' " " " " " " 200 '' *' 



1. 80-120 " " " " "• " " 100 " " 



There is another possible terrace at 40-60 feet above sea 

 level which is fairly well shown around Stonington, but else- 

 where is so modified by glacial deposits that it will be disre- 

 garded in this discussion. 



Distribution of Terrace Levels. 



The highest, or 500-foot level, is shown on Chapman Hill 

 {^g. IB) and is reached by the other high hills of the region 

 (fig. 1 C, D, E). These hills, however, are so few and have 

 such small summit areas that one is forced to examine the country 

 farther north (Moosup quadrangle) to see if the 500-foot level 

 is one of great extent. Such an examination shows that a 

 500-foot elevation is attained by all the higher hills in the 

 southern part of the quadrangle, and is well developed around 

 an area of higher land near Sterling, Conn. In places in 

 Yoluntown Township it remains in summit patches a mile and 

 more in length, and i- to f mile in width. The development 

 of these flat patches over so broad an area, at the same level as 

 the higher hill tops to the south, does not seem fortuitous, 

 especially when we find that the hills are niade of different 

 rocks and in different attitudes. So, although onl}^ suggested 

 in the Stonington quadrangle, the 500-foot level will be con- 

 sidered the highest level which must be taken into considera- 

 tion in the history of the region. 



The 400-foot level is the best defined of all in the Stonington 

 quadrangle, and is best preserved on Swantown. AVintechog, 

 Cassadock, and Champlin hills as shown in fig. 1 D, C, A. 



The 300-foot level is well-developed in the two westernmost 

 groups of pj'ofiles (fig. 1 D, E), but is poorly shown farther 

 east. 



The 200-foot level, on the other hand, is best developed on 

 the east (A and E, fig. 1), but also shows in the accordance 

 of levels of most of the hill tops near the coast. 



Tlie 100-foot level also is not seen so much in well-developed 

 upland levels as in distinct terraces on the fronts of the hills 

 near the sea. Quarry Hill at Westerly has the broadest sum- 

 mit area at this elevation. 



