HOULTON-DBNNYSVILLE SYSTEM. 77 



which crosses the Maine Central Raih-oad a short distance east of Tomah 

 station, but for 5 or more miles I have no note of any glacial gravels. The 

 country is a wilderness difficult to traverse, and even large ridges might 

 easily escape observation. The difficulty of the search is increased by the 

 fact that near the lake the gravel is covered by considerable till, and this 

 condition may continue for some miles southward. And if the ridge is not 

 large at the south end of the Arm of the Lake, on an up slope, it should be 

 expected that on a southward or down slope of 15 or more feet per mile 

 the stream would sweep its channel clear of all except the coarsest matter. 

 It is thus seen that although glacial gravels could not be found for a con- 

 siderable distance, this fact does not, under the circumstances, prove that 

 the glacial stream did not flow down this valley. Careful search and inquiry 

 failed to show any line of gravels reaching from the foot of Grand Lake to 

 Lambert Lake or other point southwestward. 



A mile or two south of Tomah station the two branches of Tomah 

 Stream unite, and from tliis point of junction an extensive series of reticu- 

 lated ridges and broad plains of sand and gravel are found in the valley of 

 the main stream, extending to near the mouth of Little Tomah Stream in 

 Codyville. These large plains demand the assumption of large glacial 

 streams. The Smyrna-Danforth osar river flowed down the valley of the 

 west branch of Tomah Stream. This was a larger glacial river than that 

 which flowed south from Grand Lake, and while it was comiDetent to have 

 brought down the large plains of the Tomah Valley, yet the probable his- 

 tory of these plains is as follows: The two glacial rivers, one from the 

 direction of Houlton and Grand Lake, the other from Danforth, united 

 near where the two branches of Tomah Stream now unite, and together 

 produced the sand and gravel plains extending into Codyville. The eleva- 

 tion of Tomah station is 370 feet, and I estimate the elevation of the plains 

 north of Codyville to be more than 200 feet. The southern part of these 

 plains may therefore be a marine delta. 



From near the mouth of Little Tomah Stream the ridge varies from 10 

 to 25 feet in height. Its lateral slopes are gentle, thus making it quite 

 broad for its height. The ridge crosses the Schoodic River at an elevation 

 of 165 feet, and continues southward near the line between Baileyville and 

 Princeton. In the southern part of Baileyville and in Alexander the sys- 

 tem becomes broken by several gaps while following a rather low pass, 



