Nature, Volume 84Sir Norman Lockyer Macmillan Journals Limited, 1910 |
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Página 334
... Canadian Archæan or pre - Cambrian area through Suess's masterly portrayal of the " Canadian Shield , " and through Dana's account of the " V Forma- tion , about which the North American Continent was built up . It must be remembered ...
... Canadian Archæan or pre - Cambrian area through Suess's masterly portrayal of the " Canadian Shield , " and through Dana's account of the " V Forma- tion , about which the North American Continent was built up . It must be remembered ...
Página 338
... Canadian Shield . Apparently the old hummocky surface was often pretty cleanly swept , so that limestone with very little frag- mental material rests immediately upon the gneiss , but in other cases there is arkose or a basal ...
... Canadian Shield . Apparently the old hummocky surface was often pretty cleanly swept , so that limestone with very little frag- mental material rests immediately upon the gneiss , but in other cases there is arkose or a basal ...
Página 339
... shield . It may be , however , that in the interior of Labrador , where no beach - lines give evidence as to changes ... Canadian Shield begins in pre- Keewatin times , with land surfaces on which weathering took place , and seas ...
... shield . It may be , however , that in the interior of Labrador , where no beach - lines give evidence as to changes ... Canadian Shield begins in pre- Keewatin times , with land surfaces on which weathering took place , and seas ...
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acid agricultural appears atomic weight August austenite batholiths Boulder Clay British cable Canadian Shield carbide carbon cells cementite cent character chemical chemistry College colour comet congress contains Cretaceous crystalline deal described direction discussion disease electrical engineering eutectic exhibit experiments fact feet geological give given glaciers gneiss Halley's comet Huronian illustrated important inches Institute interesting investigation iron J. J. Thomson July laboratory Lake Lake Chad large number larvæ London magnetic manganese mathematical matter means ment metal method nature observations Observatory obtained origin paper peneplain Perseid photographs plant plates Pleistocene practical present pressure probably Prof radium recent reference regard rocks Royal sand scientific silicon Society soil species specimens sulphur surface technical temperature theory tion trypanosome University various volume