188 GLACIAL GEAVELS OF MAINE. 



valley. According to the information which has reached me, there are two 

 low passes from the head of Bog Brook, one southward along a branch of 

 Sevenmile Stream to Kingfield, the other southeastward through Lexington 

 to New Portland. A large plain of sand and gravel is found in the ^^alley of 

 Sevenmile Stream above Kingfield; also in tlie Carrabassett Valley above 

 North New Portland. These sediments extend across the valleys in the 

 position proper to valley drift. The gravel may have been brought down 

 from the Dead River region by glacial streams at a time when the ice still 

 remained in the valley of Dead River, but had melted over the valleys to 

 the south. It is quite possible also that some of the alluvium of these val- 

 leys is after the oi-der of the osar-plain. My exploration of these valleys 

 did not reach above Kingfield and North New Portland. 



stratton Brook horseback. — A two-sidcd lAclge IS reportcd by Rev. Stephen 

 Allen, of Winthrop, as being situated between Stratton Brook and the road 

 from Eustis to Kingfield. It is said to begin 4 miles from Eustis and to 

 extend 3 miles southeastward. 



A horseback 3 miles long is reported as being found near the divide 

 between Arnold River, a tributary of the Chaudiere, and the Dead River, 

 above Chain Lakes. 



NOTE ON THE NORTHWESTERN PART OF MAINE. 



West of the Kennebec River and north of a line drawn from the 

 upper Androscoggin Lakes to Anson, the glacial gravels appear to be 

 scanty as compared with those of the area south of that line. But the 

 same can be said of the whole of the State northeastward at the same 

 distance back from the coast. The distinct ridges are short, and several of 

 them are lost in a sedimentary plain that presents the external features of 

 a frontal plain of glacial sediments. The relations of the osars to the 

 frontal plains of apparent valley drift, and of these to the silty and clayey 

 plains which reacli all the way down to the old sea-level, furnish an intri- 

 cate problem. The matter will be discussed more fully hereafter. A com- 

 parison of the alluvium of the valleys of the streams situated in the 

 interior of the State, from the Sandy River to the East Branch of the 

 Penobscot, reveals many featured common to all of these valleys. Perhaps 

 no one of them would alone warrant the belief that these plains of sand, 

 gravel, silt, and clay which reach from the extremities of the short osars 



