BY LEO A. COTTON. 771 



is quite soft and decomposed in the neighbourhood of the deposit. 

 From the excavated material a specimen of granite, strongly- 

 impregnated with some iron and much arsenical pyrites, was 

 found. Another interesting specimen was a piece of pegmatitic 

 quartz and felspar, passing into a fine-grained chlorite-rock. 

 Scheelite is also present in small quantity. 



Text- fig. 7 shows a section of the west wall of the excavation, 

 and indicates the relation of the lode-stufif to the country-rock. 



A similar occurrence is that of the " Strand Mine," about 2, 

 miles N.E. from Howell. The deposit, like those previously 

 mentioned, does not appear to have any linear extension, and 

 hence cannot be called a lode. A cr^eat amount of lode-material 



-i- -h 



Scs/e 



10 Feef 



Fig. 7.— Kelly's Reef at Stannifer. A, Alluvial; B, Soft decomposed 

 '*Acid Granite"'; C, Zone of yellow iron-oxide; D, Zone of mixed iron- 

 stone, chlorite, and felspar; E, Chlorite and felspar of lode-material. 



has been excavated from a shaft sunk on the deposit. The lode- 

 stuff consists chiefly of chlorite. There is more quartz associated 

 with the deposit than at Stormer's and Kelly's reefs. This quartz 

 is clear and crystalline, and occurs in bunches and veins showing 

 comb-structure. These veins and bunches of quartz are almost 

 invariably bordered by a zone of pink felspar. This is illustrated 

 by Plate Ixii., fig. 1. Scattered through the quartz are small 

 bunches of galena, which have not been observed in either the 



