. Annual report . Fig. 73.—View from high hill to the northeast of Obushkong lake, showing Davidson and Obushkong Fig. 74.—Bridal Veil Falls, east branch, Waboose creek. 170 Bureau of Mines No. 4 Cobalt Series Quartzite, arkose, upper conglomerate, greywacke-slate, quartzite,lower conglomerate. Great Unconformity Laurentian Syenite and granite, intrusive into the Keewatin but not into theCobalt series. Igneous Contact Keewatin An igneous complex, consisting chiefly of altered basic igneousrocKs with some light-colored intrusives and iron formation. The Temiskaming series, which occurs
. Annual report . Fig. 73.—View from high hill to the northeast of Obushkong lake, showing Davidson and Obushkong Fig. 74.—Bridal Veil Falls, east branch, Waboose creek. 170 Bureau of Mines No. 4 Cobalt Series Quartzite, arkose, upper conglomerate, greywacke-slate, quartzite,lower conglomerate. Great Unconformity Laurentian Syenite and granite, intrusive into the Keewatin but not into theCobalt series. Igneous Contact Keewatin An igneous complex, consisting chiefly of altered basic igneousrocKs with some light-colored intrusives and iron formation. The Temiskaming series, which occurs at Cobalt and Porcupine, was not recog-nized in the area shown on the accompanying map, but rocks belonging to this serieswere observed in Midlothian township, 18 miles northwest of Gowganda lake, by JamesG. MacMillan.* The oldest rocks comprise essentially the greenstones and green schists of theKeewatin. They show evidence of being largely altered basic igneous rocks. Thesehave been much intruded by light-colored or acid dikes, which have also been muchmetamorphosed, and now show as bands in the darker rocks. In
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
