DETAILED STRATIGEAPHIC DISTRIBUTION. 



153 



Detailed stratigraphic distribution of Cambrian and Ordovidan Brachiopoda — Continued. 

 trtah: Blacksmith Fork, Cache County— Continued. 



Utah: House Kange, Millard County. 



a The line of separation between the Middle and Lower Cambrian occurs somewhere in the Brigham quartzite, and this thickness (5,420 feet) 

 probably includes several hundred feet of Lower Cambrian beds. 



b Section exposed on the east and southeast slopes and ridges of Notch Peak. 



c The section is carried along the strike of the exposed strata 2 miles east to the west side of Orr Ridge, where the rocks of the Orr formation 

 are unmetamorphosed. 



