482 



Report of the State Geologist. 



the railroad leaving it at the point stated. Scarcity of outcrops prevents a 

 precise location of the limit in this direction, but it is probably cut oft' by 

 gneiss about two miles south of Canton village. It may possibly, however, 

 be connected with an area of limestone in the southwest corner of Potsdam, 

 although the latter appears to be entirely surrounded by gneiss. 



The linear extent of this belt from Antwerp to its probable end in 

 Canton, is about thirty-five miles. Its width in a northwest-southeast 

 direction is extremely variable. Beginning in Antwerp with an average 

 w idth of about two miles, it expands rather suddenly to six or eight miles in 

 Gouverneur, narrowing again as it passes out of this township to the north- 

 east. Along the northern boundary of Gouverneui'j gneiss appears in long, 

 narrow strips, whose precise extent is uncertain ; so that it is not clear 

 whether or not the Gouverneur limestone belt is separated entirely from a 

 Luge area which extends from Theresa, across Rossie and Macomb, and 

 disappears under the Potsdam, in De Peyster. If distinct, these two belts can 

 have only a very narrow strip of gneiss between them to the west, and the 

 indications are that this disappears entirely in the vicinity of Yellow lake, in 

 Rossie. Eastward, in De Peyster and De Kalb, a large area of gneiss comes 

 in between the two limestone belts. The southern edge of the Gouverneur 

 belt is more clearly defined, and an extensive area of gneiss separates it 

 from the next belt to the south. The latter, which may be called the 

 Edwards belt, begins in Fowler, crosses Edwards, and seems to run out in the 

 western part of Russell. Its area is much less than that of the Gouverneur 

 belt, but it is of economic importance on account of its talc deposits. This 

 belt is quite sharply defined, although along its southern edge there is a 

 rather confused mingling of limestone and gneiss, of much interest and 

 deserving careful investigation. Another wide stretch of gneiss separates the 

 Edwards belt from the Diana belt, which crosses the towns of Diana and Pitcairn 

 with a width of about two miles. Directly southeast of this belt, that is, 

 normal to the trend of the belts, the country has been examined for only a 

 lew miles, but to the south it has been traversed some thirty miles or more 

 w ithout the finding of any limestone. However, it is not certain that other 

 belts may not exist in the forested region to the southeast, although facts t<> 

 be stated below indie. ite that this is probably not the case. 



These four belts, or, if the Macomb and Gouverneur belts be considered 

 one. three belts, comprise a large proportion of the crystalline limestone of 

 the region examined. The remainder is found in the scattered patches to 

 w hich reference has been made. These occur both near, and at considerable 



