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GEOLOGY.
<br />l lease. The only geological survey of the district in a partial one contained in the
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<br />th a cap_ aGeological );xploration of the Fortieth' parallel by Clar
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<br /> ence
<br />ing
<br />(I670).
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<br />'asaessablo• ~~..~
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<br />The country. rock may be generally described ns a gneinaic or banded ~granite,though
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<br /> having sometimes a deetinetly granitic character. It frequentlyp}rows a~,thinly
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<br />. bwtded atructure,the lines of banding or bedding dipping easterly.
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<br />- Intrusions of quartz porphyry~covmonly knovrn an porphyry are to be
<br />found occasional
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<br />'~ •0'• -ly along the ,yint planes which cross the gnei ~,andin some in9tances maybe
<br />ty~Colo• :, A 1 ~, ;:rrt1~:•to - }, ,
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<br />ahovrs to have a direct bearing on the ore deposition.
<br /> The lodes possess a high degree of parallelism in their ntrike or direction;their
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<br /> course with but a Few exceptionsvbeing between due
<br />eaat and tveat on the one
<br />ltand
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<br />and north east and south west on the other. The~~dip~ef the lodes is generally at
<br /> .... ,,.;
<br />ter by its a high angle but changes frequently with depth.
<br />sill on the The veins show little indication of having filled ai fisaure,as usually under..^,tood
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<br /> but follot the cleavage ,7oints,and.in some cases the foliation planea,of the gneiss
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<br />9 differ- and replace the country rock oneach aide of them. The joints also cross the
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<br />working porphyry dikes and the veins are often in thelatter rocY,•
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<br />,300,400, The vralls of the veins ara usually well defined. A Ain clay selvage or parting
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<br />ORY 3aeond betvreen the walls and the vein filling in apparent in moat cases.
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<br />ad including.
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<br />rld Coin r -, .,. .. ... ~ ,:
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<br />!ills to ~. :. .:.... .,
<br />ly pollut- ':S:;oh t:. u:, : i , .: ... . ,.., r.. :,a', i a ., :, rr:u .,
<br />ings,ntreet ,,,~, ~, ,
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<br />y attd u'~ ~,:, b 'c., .. ,i, :.r uu .. :. o.l ,. G
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