148 GLACIAL GEAVELS OF MAINE. 



system from end to end. They vary from one-fourth mile to IJ miles in 

 length. The system seems to end in a cone or dome of glacial gravel sit- 

 uated on the east side of Georges River, just above the railroad bridge at 

 Thomaston. The gravel lies for most of the way on the west side of the 

 river, and not far above it. The system lies in the towns of Searsmont, 

 Appleton, Union, Warren, and Thomaston. 



Near Union Village a small mound of this series shows contorted and 

 folded strata overlying stratified material. The dome lies so low in the 

 narrow valley that it is very improbable an ice floe came from the north 

 with sufficient force to distort the stratification. More probably the gravel 

 was deposited beneath the glacier and the distortion was due to the pressure 

 of the moving ice. This system is in a region once wholly covered by the 

 sea, unless on the extreme north. 



The length is about 8 miles. 



HARTLAND-MONTVILLE SYSTEM. 



A series of rather short ridges begins near the top of a high range of 

 hills in the northern part of St. Albans. It extends southward past Indian 

 Pond and through St. Albans Village, and thence southwestward along a 

 branch of the Sebasticook River. A short distance south of Hartland Vil- 

 lage this series unites with another, which takes the form of a large ridge 

 beginning at the south shore of Moose Pond and thence taking a south- 

 ern course through Hartland Village. The gravel of the latter series is 

 much rounder than that of the St. Albans series, which is but little worn. 

 This indicates that the Moose Pond system probably has a northward exten- 

 sion. The Cambridge-Harmony eskers hereafter to be described would 

 naturally be a part of this system, but thus far I can not prove a connec- 

 tion. From Hartland the united series continues south as a quite continu- 

 ous osar ridge for several miles. In the southern part of Pittsfield the 

 system is interrupted at several places. About one-half mile north of Pitts- 

 field it rises into a rather high cone called the "Pinnacle." From this point 

 southward through Pittsfield, Burnham, and Unity the gravel takes the form 

 of a nearly continuous osar with very gentle lateral slopes. It rises 10 to 

 30 feet above the marine clay which borders and partly covers it. In 

 places the ridge is nearly one-eighth of a mile broad, yet it is rounded on 



