274 THE JOURNAL OF GEOLOGY. 



tical gash four or five inches wide, is filled with conglomerate, 

 connecting with the conglomerate below, and tapering irregu- 

 larly to a point on the upper surface of the exposure. It is clear, 

 as Professor Van Hise has suggested, that the large mass of 

 granite was a partly detached block of the irregular surface upon 

 which the conglomerate was laid down, and that the sedimentary 

 material at A and B has sifted into cracks existing in it at that 

 time. 



VI. Summary. 



1. We have near Republic a conglomerate which from its 

 relations must lie at the base of the Lower Huronian, and cannot 

 possibly be Upper Huronian. 



2. This conglomerate rests in visible contact upon granite, 

 and is a basal conglomerate; — i. e., it contains numerous water- 

 worn fragments of the granite upon which it rests. 



Henry Lloyd Smyth. 



