Nature, Volume 84Sir Norman Lockyer Macmillan Journals Limited, 1910 |
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Página 336
... Huronian , for the next series of rocks rests with a great discordance on the upturned edges of the synclinally disposed Keewatin schists and the truncated domes of Laurentian gneiss . The Huronian . The Lower Huronian has very ...
... Huronian , for the next series of rocks rests with a great discordance on the upturned edges of the synclinally disposed Keewatin schists and the truncated domes of Laurentian gneiss . The Huronian . The Lower Huronian has very ...
Página 337
... Huronian extend as a wide band for 200 or 300 miles north - east of Lake Huron , and in this area the uneven surface of Laurentian and Keewatin beneath the Lower Huronian Boulder Clay pre- serves for us a portion of the earliest dry ...
... Huronian extend as a wide band for 200 or 300 miles north - east of Lake Huron , and in this area the uneven surface of Laurentian and Keewatin beneath the Lower Huronian Boulder Clay pre- serves for us a portion of the earliest dry ...
Página 339
... Huronian . During the Middle Huronian , or in the interval between it and the Upper Huronian ( Animikie ) , mountain - building was renewed on a grand scale , many synclines of Keewatin and Lower Huronian rocks being caught between the ...
... Huronian . During the Middle Huronian , or in the interval between it and the Upper Huronian ( Animikie ) , mountain - building was renewed on a grand scale , many synclines of Keewatin and Lower Huronian rocks being caught between the ...
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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 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