\ 
G. F. Becker—Mineral Belts of the Pacific Slope. 209 
Art. XXVIII.—The Relations of the Mineral Belts of the Pacific 
Slope to the Great Upheavals ;* by Gro. F. Broker. 
Prorgssor W. P. BLAKE first drew attention to the series 
of mineral belts of the Pacific slope and their striking parallel- 
would now scarcely be claimed that there are more than four 
distinct ore belts on the Pacific slope, viz: the lead silver belt 
of Utah, the gold belt and the quicksilver belt of California, 
* A part of the substance of this paper was first written for a Census report on 
The Statistics and Teehnology of Precious Metals, by Mr. S. F. Emmons and my- 
Sell, now in press. . 
+ Report to the California State Board of Agriculture, 1866. 
} Exploration of the 40th Parallel, vol. iii, Chap. 1. 
