U. S. GEOLOGICAL SURVEY 



MONOGRAPH XIX PLATE XXXI 



ORE DEPOSITS. 



Fig. 1, — Longitudinal section of south deposit, Colby nnine. 

 Fig. 2. — Longitudinal section of north deposit, Colby mine. 

 Fig. 3, — Cross section of north and south deposits, Colby mine. 

 Fig 4. — Longitudinal section of Trimble mine. 



Fig. 5.— Cross section of Trimble mine. 



Fig. 6. — -Cross section of Minnewawa mine. 



Fig. 7.— Theoretical section to show variation from unaltered carbonate. 



