Nature, Volume 84Sir Norman Lockyer Macmillan Journals Limited, 1910 |
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Página 278
... Boulder Clays and alternating beds of sand and clay ; the first - named , two or three in number , somewhat limited in extent , and rather lenticular in form , are slightly sandy clays , full of pieces of chalk , flint , and other kinds ...
... Boulder Clays and alternating beds of sand and clay ; the first - named , two or three in number , somewhat limited in extent , and rather lenticular in form , are slightly sandy clays , full of pieces of chalk , flint , and other kinds ...
Página 279
... Boulder Clay , and extends on the south at ast into Worcestershire . On the western side it merges ith the upper ... Boulder Clays and gravelly sands , lach it must suffice to mention , extend from the high- nds of South Wales for a ...
... Boulder Clay , and extends on the south at ast into Worcestershire . On the western side it merges ith the upper ... Boulder Clays and gravelly sands , lach it must suffice to mention , extend from the high- nds of South Wales for a ...
Página 284
... Boulder Clay , over great irregularities of the surface , and are sometimes found , as already stated , up to more than 1200 feet . Either of these deposits may have followed the sea - line upwards or downwards , but that explanation ...
... Boulder Clay , over great irregularities of the surface , and are sometimes found , as already stated , up to more than 1200 feet . Either of these deposits may have followed the sea - line upwards or downwards , but that explanation ...
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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