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ra <br /> i <br /> <br /> <br />,~EOLOGK. - ... .. <br />:. 3 <br />he gountry rock 'is n gne ias is granitr. cut by a fisavra vein system <br />havinga general course ranging fran nort}~ east•and south west on t <br />~~the one hand to east and west on the other. , <br />',i . , <br />~~Dykea of porphyry frequently cut through the country rock. <br />i <br />