422 THE PENOKEE IRON BEARING SERIES. . 



P^irtlier, as fully indicated subsequently, in Sec. 23, T. 47, N., R. 43 

 W., Michigan, and in Sec. 28, T. 47 N., R. 42 W., Michigan, are basal con- 

 glomerates, and in the latter place the conglomerates rest directly upon the 

 comj)lex below. These unconformable ndations between the two sets of 

 rocks are here the same as between the Southern Complex and tlie westward 

 Penokee succession. The series, then, is an independent conformalde one, 

 resting upon an older complex, which served as the basement ui)()n which 

 the newer rocks were formed as fragmental and nonfragmental water- 

 deposited sediments. 



It is thus seen that in every particular the facts and the conclusions 

 as to the relations of these rocks and the series below them are the same 

 as in the rocks to the west. This complex to the south and the series 

 under discussion are but eastern continuations of the same two sets to the 

 west already described. 



West of Sec. 18. T. 47 N., R. 42 W., Michigan, the rocks of the Eastern 

 area are bounded upon the north bv a continuous prominent range of 

 greenstone, which rises abruptly from the lower ground to the south. 

 Through T. 47 N., R. 43 W., Michigan, this range runs almost due east and 

 west. In the next tw<i miles westward it makes north about a half a 

 mile and then again cuntiuues westward. It is plain that this greenstone 

 overlies the rocks of the Eastern area. That there is an}- great or certain 

 discordance between the two series can not be jjroven from the Eastern 

 area. However, this greenstone range, through the east part of T. 47 N., 

 R. 44 W., Michigan, and through T. 47 N., R. 43 W., Michigan, appears to 

 overlap to some extent the rocks of the Eastern area, Avhicli to this degree 

 would indicate an unconformity, l:)ut would not be certain proof of one. 

 However this may be, this range is an eastward continuation of the green- 

 stone which overlies the Penokee series to the westward, just as the rocks 

 under discussion are an eastern continuation of that series itself There 

 is, then, no doubt that the same relations obtain between them that pre- 

 vail to the west. 



The only fiirtlicr pniut in this connection is whether the formations of 

 the Eastern area ari' to he placed with the Penokee series proper or with 

 the series to which the Clicrty limestone belongs. The lower formation of 



