266 KEMP'S ORE DEPOSITS. 



feet high, and from these the manganiferous rocks form a low 

 monocline to the north. This district is in northern central Ar- 

 kansas. Southwestern Arkansas contains a second district in 

 which the ore occurs in a great stratum of novaculite of probable 

 Lower Silurian age. The ores are of no practical importance, 

 being too lean and too disseminated. Small amounts of manga- 

 nese ore have been obtained in California, in San Joaquin County, 

 and from Red Rock, in San Francisco harbor. The former, and 

 perhaps others in the State, may prove important hereafter. 



2.14.17. Quite productive deposits are found in pockets at 

 Markhamville, Kings County, N. B., in Lower Carboniferous lime- 

 stone. Some thousands of tons have been shipped. Other mines 

 are situated at Quaco Head. At Tenny Cape, in the Bay of Mi- 

 nas, Nova Scotia, is another deposit in Lower Carboniferous lime- 

 stone which has furnished several thousand tons of ore. Others 

 less important occur on Cape Breton. 



The production of manganese ores in the United States seems 

 to be falling off. In 1887 it reached its maximum, 34,524 long 

 tons. In 1889 it was 23,927 tons, divided as follows : The Vir- 

 ginias, 14,616; Arkansas, 2528; Georgia, 5208; other States, 1575. 1 



1 ''Manganese Mines near Santiago, Cuba," Engineering and Mining 

 Journal, Nov. 24, 1888, p. 439. H. P. Brumell, "Notes on Manganese in 

 Canada," Amer. GeoL, August, 1892, p. 80. D. T. Day, Mineral Resources, 

 1882, p. 424; 1883-84, p. 550. F. P. Dunnington, "On the Formation of 

 the Deposits of Oxides of Manganese," Amer. Jour. Sci., iii., XXXVI. 175. 

 Rec. W. M. Fontaine, "Crimora Manganese Deposits," The Virginias, 

 Mirch, 1883, pp. 44-46. Rec. C. E. Hall, " Geological Notes on the Man- 

 ganese Ore Deposits of Crimora, Va.," M. E., June, 1891. E. Halse, "Notes 

 on the Occurrence of Manganese Ore, near Mulege, Baja California, Mex- 

 ico," Trans. N. of Eng. Min. and Mech. Eng., XLI. 302, 1892. H. Hoy, 

 "Ores of Manganese and their Uses," Proc. and Trans. N. S. Inst. Nat. 

 Sci., Halifax, II., 1864-65, p. 139. " Manganese Mining in Merionethshire, 

 England," Engineering and Mining Journal, Dec. 18, 1886, p. 438. R. A. 

 F. Penrose, Ann. Rep. Ark. Geol. Survey, 1890, Vol. I. The best work 

 published. Rec. " Origin of the Manganese Ores of Northern Arkansas," 

 etc., A. A. A. S., XXXIX. 250. J. D. Weeks, Mineral Resources of the 

 U. S., 1885, p. 303 (Rec.) ; 1886, p. 180; 1887, p. 144. D. A. Wells, "On 

 the Distribution of Manganese," A. A. A. S., VI. 275. C. L. Whittle, 

 "Genesis of the Manganese Deposits at Quaco, N. B.," Proc. Bost. Soc. 

 Nat. Hist, XXV., p. 253. 



