BARRE MORAINE. 699 



surface is very irregular, as may he seen by reference to the topographic 

 map (PI. III). For several miles east from this range of knolls the sur- 

 face is nearl)^ all plane, there being only an occasional low knoll. There 

 is then a sharp ridge with north-south trend, which connects at the south 

 near East Shelby with the main ridge. It is about 1^ miles long and one- 

 fourth mile or less in widtli. Its height ranges from 15 to 60 feet. The 

 surface is thickly strewn with bowlders, which add to its morainic expres- 

 sion. This ridge and the range of gravelly hills to the west seem to be 

 morainic spurs rather than eskers; at least they are not so regular in fonn 

 as eskers. 



The most prominent ridges of Orleans County are found in the next 

 spur to the east. They cover a track nearly 2 miles in length (from north 

 to south) and a mile or less in width. The main ridge bears some i-esem- 

 blance to an esker, but there are many irregular-shaped ridges and knolls 

 associated with it. It terminates at the south in a flat-topped tract which 

 stands about 80 feet above the bordering plains and which incloses a deep 

 basin. A marsh lies in the midst of tlais system of ridges. There is on 

 the west side of the marsh a ridge about 40 feet in height which lias a 

 flattened top in which there are shallow basins. On the east side of the 

 marsh is a less regular ridge, which in places presents the form of an esker. 



From W est Barre eastward to the east end of Oak Orchard Swamp the 

 ridges and knolls are similar to those found south of the main ridge to the 

 west from West Barre. They trend east-northeast to west-southwest and 

 are rather narrow and sharp. The height is seldom less than 15 feet and 

 in places reaches 40 feet. 



The prominent group of ridges and knolls in the New Guinea settle- 

 ment at the east end of Oak Orchard Swamp is well represented in PI. III. 

 Basins appear on the crests of the ridges, two of which are shown on the 

 map. The ridges rise abruptly 40 to 60 feet above the bordering swamp. 



From this group of ridges eastward to the Genesee River the knolls are 

 rather scattered and of irregular shape. The}' contrast strikingl}- with the 

 regular form of the drumlins to the south, as may be seen by reference to 

 the topographic map. Two ridges in this part of the moraine are worthy 

 of notice, one is an esker or gravel ridge near Ogden and the other a sandy 

 ridge near Chili. 



East and soiith of Ogden Village there is a narrow gravel ridge 15 to 



