196 



BULLETIN OF THE 



VII. Forth Twin Lake. 



Soundings taken by Mr. Wilson, along middle, from north to south, about two miles. 



Mine were lost. 



m. In. 



1 19 



2 18 3 



3 . . 16 



4 22 4 



5 23 



6 22 4 



7 19 6 



8 19 



J 



4 



An Unreported Kame. 



From a spot on the western shore of Middle Joe Merry Lake, known 

 to the guide as Gordou's Landini^, a name derived from former lum- 

 bering operations, a " horseback," or kame, runs two and a half miles 

 north 28^ we>st, forming for some distance the shore of the lake. On 

 examination it proved to be an interesting specimen of its kind. It 

 slopes at each end gradually to the general level, but through all the 

 central portion maintains a tolerably uniform height. At a fairly rep- 

 resentative point, it was found to have at its slightly rounded top a 

 width of 15 feet, and by use of a clinometer and level the inclination of 

 the east side was ascertained to be 30^, and the height 39 feet above 

 the lake. The west side has an angle of 25° and rises 2G feet above an 

 old pond of equal length with the kame, now changed to a swamp, only 

 the width of the kame intervening between the swamp and the lake. 



I 



Many granite bowlders of from one to two feet or more In diaioeter arc 

 strewn upon the ridge at and near its summit. The smooth and un- 

 broken surfiice of the kame seems to indicate rather that they were 

 deposited upon the ridge subsequently to its formation, than that, having 

 made part of the original structure, they were by denudation left pro- 

 jecting from Its surface. 



The Granite Area. 



Doubts respecting the actual existence of the granite area represented 

 in the geological map were suggested during a rapid passage, in 1869, 

 over the route now taken. The facts already stated, so far as they bear 

 on the theory of such an area, do not go to sustain it. The observations 

 now to be noted are more closely related to it. 



From Gordon's Landing an excursion was made to Joe Merry Moun- 



