Am. Jour. Sci., Vol. XXXVII, 



Plate VIII 



Slates —Eig-Xi 



Wes 



Footrwall 

 HORIZONTAL SECTION 



Fig. 2. 



.Open 



iSg==gj-— Surface drift 





Jasper 



Quartzite 



Footwall slates 

 HORIZONTAL CROSS SECTION 



VERTICAL CROSS SECTION 



West 



Fig. 3. Probable continuation 



before ; ' "'' Erosion 



