142 



GEOLOGY OF TONOPAH MINING DISTRICT, NEVADA. 



On the 237-foot level there is a distance of about 200 feet between the portion 

 of the vein just north of and that south of the shaft, as exposed in the drifts, 

 but connecting bunches of quartz probably exist in the undeveloped country 

 to the southeast of the shaft (fig. 35). On 

 the 300-foot level the exploration has beer 



Fraction No. I 

 shaft 



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'I 



\ \ 



\ > 



\ 



\\ 

 \\ 



Scale 

 o 10 20 30 40 so feet 



FraaionNoJ sh 



Via. 36. Horizontal plan of vein aud limits on ine '>i 

 foot level, Fraction No. 1 workings. 



Fio. 36. Horizontal plan showing vein and faults on 

 the 800-foot level. Fraction No. 1 workings. 



more thorough, as far as it went, and the different steps of the faulting are almost 

 continuously shown (fig. 36). On the 400-foot level a single block of quart/, probably 

 belonging to the same vein, and bounded on all sides by faults, was found about 



