356 BOARD OF AGRICULTURE. 



almost entirely obliterated by the cleavage, or what appears to be 

 more properly such ; so that in my notes I Iind these observations 

 as to the bearings of the strata marked as questionable, with the 

 exception of the last on the contorted strata, which I took as proof 

 of its stratified character. Now this latter has a south-east dip, 

 yet the last observation before this is on the atvike of the other, 

 and one which I had marked as questionably north-west. All of 

 ■which would go towards strengthening the suspicion as to the real 

 character of the supposed stratification. 



We found no ledges from this lake down to Cauquomgomoc. 

 But when we arrived at the lake, and turned to the left along the 

 north-east shore, we encountered a very cui'ious and somewhat 

 puzzling series of formations. The first six ledges and embossed 

 rocks, occupying a space of less than the eigth of a mile, were 

 composed of a compact, fine-grained conglomerate, broken up by 

 numerous joints, but having no recognizable stratification. It had 

 been somewhat metamorphosed, and had a decided calcareous 

 character. Probably the cementing material is carbonate of lime. 

 Then there is a change to clay idate, having a north-west di|) of 

 15°. Just beyond this is another ledge of an undoubted argilla- 

 ceous rock, yet massive, and without any apparent stratification 

 or lamination. The next is true clay slate with a dip of *\b° north 

 25° west. With this the slate terminates and is succeeded by a 

 species of conglomerate of uncertain stratification. It appears to 

 be made up of largo boulders of varying composition, altered so as 

 to make a rock of almost homogeneous texture. The most con- 

 spicuous component is a brownish-red sandstone. Yet the whole 

 rock has the peculiar argillaceous odor. 



Beyond this again we came to another set of clay slate strata 

 having a westerly dip of 75°. These strata were very much 

 weathered — filled with long ril'ts and holes — an effect of its uneven 

 decomposition. Tims within less tlian one mile and a half, there 

 were four changes in tlie character of the rock: 



1st — A fine-grained conglomerate; 



2d — Clay slate ; 



3d — Coarse-grained conglomerate rock; 



4th — Clay slate, much weathered; 

 Presenting an interstratification of two large beds of conglomer- 

 ate. We found this same thing in miniature upon arriving at the 

 termination of these rocks, where there is a succession of inter- 



