172 GLACIAL GRAVELS OF MAINE. 



Sedimentary clays of uncertain origin extend up the Sebasticook to near 

 Hartland Village, not far from the southeast end of Moose Pond. From 

 the southwest angle of the same pond a strip of sedimentary clay one-eighth 

 to one-half of a mile wide is found along the line of the glacial gravel south 

 and west through Cornville into Canaan, where they are plainly marine. A 

 line of clays is also said to extend from Canaan eastward into Hartland. 

 These facts prove that clay extends continuously up to the elevation of 

 Moose Pond, 244 feet. The marine fossils in Palmyra have an elevation 

 of 215-230 feet. It will be an interesting problem to determine how far 

 the marine clay extends and where the kame border or the fluviatile clay 

 begins, for the clays along the line of the gravel system in Cornville may 

 have been deposited in a broad channel in the ice. The delta-plain near 

 the west end of Moose Pond is two or three times as broad from west to 

 east as from north to south. The coarsest matter is on the north; hence the 

 streams flowed from that direction. 



In Cornville and Canaan both the gravel system and the bordering 

 clays are strewn with numbers of large granite bowlders. Similar bowlders 

 overlie the marine clays all the way to the sea, and they are probably floe 

 bowlders. 



From Waterville to Bowdoinham the gravels of this system lie along 

 the Kennebec River, or only a short distance from it. The road gravel of 

 Augusta, Hallowell, and Gardiner comes from this series. In a few places 

 the mounds and short ridges form hills 50 to 70 feet high, and some of 

 them form a conspicuous feature of the scenery of this beautiful valley. 

 Among these is the hill situated on the west side of the river just south of 

 South Gardiner, where the Maine Central Railroad has cut throiigh about 

 30 feet of gravel and cobbles. 



This system shows a decided tendency below Waterville to follow the 

 crests or slopes of the hills on one side or other of the river rather than to 

 follow the bed of the river. In general the material is from the size of cob- 

 bles down to sand grains, but here and there the higher hillocks contain 

 bowlderets, and sometimes bowlders 2 to 3 feet in diameter. A pinnacle 

 near the north line of Augusta consists, judging from what can be seen on 

 the surface, of a mass of stones and bowlders but little water polished and 

 much resembling till. 



Length of system, 55 miles. 



