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GEOLOGY. 3 I ~~. <br />The country rock in a gneissic or banded granite cut by fissure veins, <br />The vain on which tha prasent mining iR done LaR a course IJ.20°P.r <br />average vridth of h~ ft, rand dips to the S.i;.at Ang]P.R varying from <br />4-0° to 70°. <br />The vain filling consists of the altered country cork rbeing a gnartz- <br />lose and fel.dapat}tic mixture assor, inted vri t}1 n streak of wo]frami tar <br />same being A tungstate of iron and nangananartlle latter also being din- <br />serninat ed t}irough t}:e qum•t:. and feldspar. <br />;The vrolfrarnita usually orcnrn in bunches cr pockei,s irregularly dis- <br />~I tributad through the vein. <br />i Tha above ors in one of the sources of tungRtic acidr7ru•gely unrd in <br />t}1C RIA11Uf(lCtnrP Of tUngBt Crl fltP.O] flild i/L t]li'. al'tn, <br /> <br /> <br />