Plate 6 



1, Typical exposure of the Lower Melville sandstone, looking approximately north 



in Sec. 23, T. 5 N., R. 15 E. The valley in the upper right corner is on the 

 Upper Lebo (No. 2), with low barren hills of the Lower Lebo (No. 1) 

 beyond it. 



2, Shell limestone in the Melville at L(ic. 40, Sec. 29, T. 5 N., R. 15 E. Such beds 



characterize the middle part of the Melville, although the formation is 

 predominantly of sandstone and shale. The invertebrate beds are gen- 

 erally not so thick or so well exposed as they are at this locality. The 

 apparent nodules are gastropod shells. 



