390 THE PEXOKEE IKpX BEARING SERIES. 



inclination are rather hard, green and black shites. All ledges in which a 

 southern dip was found were closely examined, in order to ascertain 

 whether this apparent southern dip is true bedding, or is due to slaty cleav- 

 age. It was found impossible to determine this point in most cases. 

 In one or two ledges there is a decided banding with northern dips trans- 

 verse to the southern cleavage. In these cases, at least, it seems proliable 

 that the southern dips are cleavage and not bedding. Taking all the facts 

 into consideration, it is probable that all of these apparent southern inclina- 

 tions are due to cleavage and the true dip of the whole belt is north- 

 ward, as a part of it certainly is, and as are all of the remaining rocks 

 of the whole area belonging to the Penokee series. This iirobability is 

 rendered greater by the fact that all rocks which do not readily take on a 

 slaty cleavage, like the jaspers, have a northern dip; while the chwey 

 rocks, kinds which are known to most readily take a slaty cleavage, are 

 the only ones which exhiljit a southern inclination. 



General pefroffraphical character. — The rocks of the belt, as before stated, 

 are essentially fragmental, although the amount of nonfraginental sedi- 

 ments is not inconsiderable. Many of the exposures are simple frag- 

 mental rocks, but in numerous places, mingled with the fragmental, is a 

 greater or less quantity of nonfragmental material ; either a carbonate and 

 the products of its alteration, or chert, or both. Generally this nonfrag- 

 mental material is subordinate in quantity to the fraginental, but in a num- 

 ber of places, in narrow belts, nonfragmental sedimentation has l)uilt up 

 the larger part of the rock, while a considerable thickness in several places 

 is formed by nonfragmental and fragmental sediments in about equal 

 proportions. The pure fragmental kinds, those which are both fragmental 

 and nonfragmental, and those which are purely nonfragmental, can not be 

 separated from one another in any stratigraphical order. In some i);irts of 

 the belt its whole section, so far as known, is partly nonfragmental ; while 

 in others fragmental sediments exclude altogether nonfragmental sediments; 

 and in yet other sections both classes of rocks are found. The only 

 possible classification of the rocks of the belt is then a lithological one, and 

 as their phases are exceedingly numerous, and the various phases merge 

 into one anotlun-, any classification would be to a large extent arbitrary. 



