SCIENTIFIC SURVEY. 



285 



The strata in the lower limestone bed are curled up and crowded 

 together very closely, as is attempted to be represented. The 



Fig. 45. 



aaaa. Limestone. 



bbbb. Slate. 



cccc. Veins of quartz. 



Planes of cleavage and stratification. 



coarser lines, parallel to the limestone beds, indicate the stratified 

 layers. These lines are not imaginary, since they may be seen 

 intersecting the cleavage planes in all the adjacent ledges. This 

 case is an interesting one, and makes it necessary to examine all 

 the strata in this region very carefully. . So long as we can find 

 beds of limestone to guide us, we cannot fail to discover a marked 

 distinction between these two kinds of planes. 



Nearly two miles west of the Forks, on the Canada Road, may 

 be seen a large mass, perhaps a dike, of coarse syenite, almost a 

 trap. Its location may be seen on the general section, h. Most 

 of this is an argillaceous rock, quite compact, and so smoothed 

 down by drift that it was difficult to obtain a specimen, or ascer- 

 tain satisfactorily whether there were any planes present different 

 from those of cleavage, which were inclined about Y0° N. 20° W. 

 Depending upon the observations thus far made, we feel sure that 

 an anticlinal exists in this formation, which is properl}'- represented 

 in the section. This makes this slaty and calcareous formation dip 

 beneath the Devonian rocks to the north-west. 



Oriskany Sandstone. 



Precisely where this formation begins we cannot tell. A mile 

 and a half east of Johnson's mountain we noticed a slaty rock 

 dipping high to .the north, which may be connected with the Oris- 



