. Ontario Sessional Papers, 1914, Scene on Blanche river, McEIroy township, showing: rocky bluff on right, 150 feet high. Scene on Amikougami lake. Hill of Keewatin basalt in back ground, rising to 460 feet above lake level. Bureau of Mines No. 4 The chemical composition of certaiu Keewatin roclts is shown in the following are typical rocks from Amikougami lake. 1. cent. Per cent. Silica Alumina Ferrous oxide Ferric oxide Lime Magnesia Soda Potash Carbon dioxide Water 1
. Ontario Sessional Papers, 1914, Scene on Blanche river, McEIroy township, showing: rocky bluff on right, 150 feet high. Scene on Amikougami lake. Hill of Keewatin basalt in back ground, rising to 460 feet above lake level. Bureau of Mines No. 4 The chemical composition of certaiu Keewatin roclts is shown in the following are typical rocks from Amikougami lake. 1. cent. Per cent. Silica Alumina Ferrous oxide Ferric oxide Lime Magnesia Soda Potash Carbon dioxide Water Manganous oxide 1. Ellipsoidal greenstone (basalt) 15 chains west of III mile post, north line ofTeck township. 2. Amygdaloidal greenstone (basalt), Amikougami lake, 15 chains north of III milepost, north line of Teck township. This rock also shows an ellipsoidal structure. Keewatin DiabaseDiabase, occurring as dikes and broad masses, intrudes the fine-grained greenstoneat many places. This rock is generally less fresh-looking than the Nipissing diabaseof Cobalt, but occasionally is mistaken for this much younger b
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