SNAKE MOUNTAIN. 261 



It will be seen from this section that there has been an elevation of most of the rocks. 

 Snake Mountain rises boldly from a plain, seven miles from Lake Champlain, and is 1220 

 feet above the lake, and 1310 feet above the ocean. Its elevation at the highest part, as 

 shown by this section, is greater by three hundred feet than it would have been originally. 



Section of Snake Mountain, Addison. 



Explanations. 



a Calciferous sandrock ; dip 10 E. 

 b Chazy limestone ; dip from 10-20 E. 



c Trenton limestone, dip 25 E. The same rock west of the fracture dips less. 

 d Utica slate ; dip 35 E. 



Hudson River slates ; dip from 25-35 E. : 

 / Hudson River limestone. 

 g Red sandrock ; dip 10-20 E. 

 h Eolian limestone. 

 * Cranberry meadow over liquid peat. 

 k Debris from Oneida conglomerate. 

 mm Fractures. 



This elevation has its maximum east of Gr. Willmarth's house. It gradually slopes to 

 the south, and in Bridport the red sandstone is no higher than the surrounding country, 

 as much as eight hundred feet below the summit in Addison. North of Addison, the 

 rock that forms the summit at Snake Mountain is at the level of Otter Creek on the town 

 line between Addison and JSTew Haven, but it caps a series of hills between Addison and 

 Missisco Bay. But it must be understood that originally, before the agents of erosion 

 had plied these old formations, the mountain was continuous at the same level from Brid- 

 port (south part) to its northern limit, at its western outcrop ; the whole dipping to the 

 east. Some portions have been worn away more readily than others ; hence the hasty 

 observer, who may have thought that these great differences of level of the sandstone 

 indicated great undulations in the strata, must see that the difference in level has been 

 caused chiefly by erosion. The color representing the red sandrock upon the Geological 

 Map shows the shape of the mountain and the range ; and indicates where the edges of 

 the range have been bitten into, as it were, by erosion ; and the height lowered in a cor- 

 responding degree. At Snake Mountain there has been less erosion than elsewhere in the 

 vicinity, for it extends furthest to the west, and is the highest portion of the range. 



The west side of the mountain presents for two miles a nearly perpendicular face. The 

 section passes through the northern part of the mountain, but we have represented one 

 fact upon it, not on the immediate line. Commencing at the west end, we find shaly 

 Trenton limestone upon the plain, according to Prof. Emrnons, and a part of the same 

 range precisely is seen further to the north on the Vergennes road, with an easterly dip. 

 We next find the calciferous sandstone at R. Hank's house, in Addison, at the foot of the 

 mountain, dipping east. Hence we have the Trenton limestone dipping apparently 



