Transactions . Pomi(>iiir Hivcr mar nioutli. At riiihl is island wiiosc to stream, lake and ;;oldfield. ?liapi lias iii\-(Mi iianic Some Porcupine Gold Quartz Deposits—Hore 173 From this statement it ^^ill be evident that the geologicalfeatures of the Porcupine area have much in common with themajority of other pre-Cambrian areas in Ontario and the LakeSuperior States. Of nearby districts, the Larder Lake presentsmore analoguos features than does the vicinity of Cobalt. Recently* the present writer has described some of the oredeposits in Tisdale towTiship, and proposes here to present some
Transactions . Pomi(>iiir Hivcr mar nioutli. At riiihl is island wiiosc to stream, lake and ;;oldfield. ?liapi lias iii\-(Mi iianic Some Porcupine Gold Quartz Deposits—Hore 173 From this statement it ^^ill be evident that the geologicalfeatures of the Porcupine area have much in common with themajority of other pre-Cambrian areas in Ontario and the LakeSuperior States. Of nearby districts, the Larder Lake presentsmore analoguos features than does the vicinity of Cobalt. Recently* the present writer has described some of the oredeposits in Tisdale towTiship, and proposes here to present someobservations on the general geology, and the microscopic charac-ters of some of the ores and their wall rocks. The specimensexamined microscopically are mostly from the Dome, Hollingerand Rea Mines. General Geology. The gold deposits at Porcupine are in what are beheved tobe pre-Cambrian rocks. The rocks in many respects resemblethose at Lake Temagami and Larder Lake in Xipissingdistrict, which have been mo
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Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1895
